First off your home is beautiful!! I think you need to be thinking about that in-ground pool you are going to put in, they need to dig it out so you don't want to go planting beds & shrubs & trees just to dig them back out so take a garden hose & map out where it is going to be-use the hose laying on ground in shape of swimming pool, then a 2nd hose a few feet out from where the pool will be as you have to have a space around the pool, you don't want that whole area too close to the back hill which might send a lot of water & dirt, etc into that area. Also are you having the pool fenced in, much safer all around if you do, neighbor kid isn't as likely to drown if he can't see water or get gate open. So pool, edging area & fencing placement all needs to be figured out 1st. Then you will want to be placing trees & shrubs where they aren't dropping leaves, flowers & twigs in the pool. Also you need to figure out how large these things will be if it gets really hot you might want some shade during hot part of day-but off at a distance Along with that you may need to plan the walkway at back of house. If pool will be used constantly that has to be thought out, probably cement walkway to house to change or will there be a pool house, bathroom trips, need to figure out how that will work as kids will drip through the house so I'd be getting some graph paper & figuring out where all the stuff you are having will be, patio in back or on that side? You can plan trees in front yard but even that needs to be where pool can't be seen or so pool can be seen depending on your preferences. Fall is good for planning trees & shrubs at least that is when my son planted back that way. So once you have the pool area mapped out then present it to this forum so they might be able to give you ideas for putting plants but if I were you I would be getting that BIL out to your house for steaks on the BBQ & pinning him down on what you've drawn & see what his opinion is, if you have put in some work planning & laying it out then he will know you are serious & more likely to help you. I have 4 younger brothers. a suggestion often gets bypassed but hand 1 a screwdriver & ask if they can screw something to the wall & might ask what else needs to be done.(things I can't figure out how to do or require more strength like changing outdoor faucet.) Hope it works.

With the redbud there and your preference for minimal planting you don't need an additional tree. Otherwise apart from their current size the main issue with the existing shrubs is that they have been formally sheared to all have generally the same size and shape, more or less. And since over around the garage an exposed foundation isn't visible you may not need to have any shrubs in front of the left part of the house at all. Due to the implication being that the foundation is not exposed there either. Maybe it would even be to your taste to have a bed of shrubs around the redbud and nothing but lawn and paving around the house.

It's a fact ... you'll not be able to get rid of the mess until you create a permanent, hard walk where there is now mulch. The magnolia roots are going to make it harder, but it must be done if there is to be a cure. I agree with others that something like concrete (simplest and cheapest) or pavers/brick are suitable. A walk laid out to acknowledge the tree will look and work better than one that doesn't. The bench only makes sense if there is a way to get to it ... i.e., use it. But because of Magnolia roots, it would add a lot of difficulty extending the walk to the bench. Therefore, I'd recommend using the bench elsewhere and having only plantings at the front of the house. Consider using a groundcover like Asiatic Jasmine to cover the magnolia roots.

big city location would help .. as z6 is about half the US and rather divergent ... with that darn sidewalk.. [i hate buliders and architects for the lack of imagination in dealing with this] .... if you want any kind of shrubs or conifers.. or small trees... work out into the useless lawn ... with that couple feet of garden bed.. you really dont have space for anything but annuals and perennials inside the walkway .. unless you want to be out there shearing twice a year .. ergo.. you would have to kill me.. before i ever planted box in there ... and if those two shrubs are still by the garage.. get rid of them also ... really.. one of them is square.. whats that all about .. lol ... and im thinking it might be an invasive burning bush ... but that is just a gut reaction... but i just had taco bell.. so take that for what its worth .. lol... maybe my gut is lying to me ...lol .. also.. while its barren .... work that soil off the lattice under the deck ... avoid future problems ... either dirty plastic.. or rooting wood ... and be honest.. is the lawn used for anything other than complaining someone has to mow the lawn every few days ... if not.. start with some nice trees out on the lawn ... make you landscape 3 dimensional.. instead of focusing on a few feet right on the foundation ... never forget..... foundation plants are to hide the foundation.. not to BE PLANTED on the foundation.. thats the root problem with your square shrub ... its a giant plant.. planted when it was a babe.. on the foundation. with no real idea of its future potential ... lets not do that again ... and as part of the 5 year plan.. i would hide the foundation on the extreme right.. and no one wants to look at the basement walls ... do you have two front doors .. reminds me of the old doctors houses in my rural town ... kinda cool ... anyway.. plan and plant your backbones.. trees ... in teh proper planting season ... plan out future shrub locations not in the foundation ... and for this year.. just plant some pretty flowers in teh beds you now have... and if it takes 3 to 5 years.. so be it ... it will be stunning ... if you want the instant gratification.. as embo noted.. just go to big box.. and buy whatever strikes your fancy ... but search out future potential.. before you plant that babe which will end up a 10 foot problem ... ken