The stone isn't terrible, and unless there is more not shown, there isn't much of it. Choose a color from the stone for the siding since you don't really like what's there. There are a lot of neutrals in the stone. If you work with it instead of fighting it it will look better. I would keep the exterior fairly dark since you painted the eaves black already. You do not need a different color on the street side, in fact that would look odd. Plant some bushes, grasses and/or flowers on that side, integrated with your new lawn treatment.

The stone is a pretty feature that is overshadowed by the current siding. Look at shades of taupe or grey/brown to enhance stone and balance with the black you’ve done. As you mentioned, landscaping will be great for the curb appeal.

I'd put the money into really improving the landscaping and leaving the stone and siding alone.

I agree to focus on landscaping.

I’d also consider painting the rest of the trimming black. And a new black front door.

Honestly the front door kinda looks like a backyard porch.
If it were me, I’d remove the porch and replace it with something on the longer side of the house, creating more of an entryway.

Inspiration

Thanks for the suggestions.

Yes, landscaping will definitely go ahead - not too concerned there. The exterior siding - stone and color have been the biggest concerns. I think I see some great ideas here:

@HU-187528210, those posts look fascinating, thanks for the mockup, the porch has to stay though, I don't have a backyard here, so it is great for summertime people watching 😀

@kandrewspa, that is some terrific idea - I hadn't considered taking a color to make the stones on a darker side. Will look further into that for sure.

Extend the porch. I didn’t suggest getting rid of it entirely. I said replace.

I agree with the suggestion to pull a neutral from the stone - I feel like this will go well with a naturalized front yard, just make sure it will go with the roof

SW Repose Gray would probably works with the stone, white trim, black soffits and eaves. Keep in mind that the colour you choose will look lighter on a large scale once applied in the outdoor light so you always need to test.

I would go with neutral colors that are close to your stones.

May be just this

or darker