Very nice! One idea would be a beautiful door knocker with your name on it in brass. Otherwise, seasonal pots of flowers using decorative ceramic pots?

A low bench in front of the window to the left of the door would be nice.....some place to put packages when your hands are full or a place to sit when removing muddy shoes. And a good looking doormat.

And in my world, containers with seasonal color at the front porch are SOP!!

You can use the Houzz sketch tool. It's under Your Houzz-Create new sketch. You upload a picture of your area and can paste and size products to give you some ideas.

I used it for the first time last night. It was fun!

What about a swing bench?

Nice entrance; though small, it has a welcoming feel to it. Wouldn't clutter it up or risk impeding ingress/egress; however, if you have room, you could create a small front/side yard patio with a couple of comfortable indoor/outdoor chairs and a small table there.

Low shrubs on each side of the sidewalk beside the porch -- preferably something that keeps its leaves year round.

A pair of hanging baskets in the arch without the sidewalk would work well for warmer weather.

Wouldn't put a chair or bench with a back higher than the window sill. A bench with wood board seat picnic bench that would sit beneath the window (one without any back) would be preferable for appearance and could still be comfortable.

https://www.google.com/search?q=picnic+bench&tbm=shop&source=lnms&sa=X&ved=0ahUKEwjpz-Tu7L3ZAhVNtVMKHedtDDAQ_AUICigB&biw=1366&bih=650&dpr=1#spd=10774685266204750349&spf=1519451220586

Or, if your budget is larger:

A caravan bench.

https://www.minimalandmodern.com/products/international-caravan-3-drawer-bench-without-back

Or a Wellington.

https://www.aaastateofplay.com/wellington-bench-without-back/

Is your porch a space where you’re going to want to sit out ever? Or is it strictly for going in and out the door? I wouldn’t put a bench if it’s not a reasonable place to actually sit for a moment, it looks weird to me when someone has benches that are obviously just decoration and never used.

I think primarily it just needs some color - a large interesting pot with some planting, perhaps a small table if you like the idea of a place to put your packages while you open the door. (I’d put the table to the right of the door, by the doorbell, so it does have to be fairly small.)

Also, what area are you in? Is there anything that is handy to keep on the front porch? For example instead of a table we actually have a small cabinet as we have steps up to the front door and live in an area with snow. So we keep a small container of salt in the cabinet where it’s trivial to grab it and do the steps and walk on the way in or out if someone notices they’re getting bad but doesn’t have time to properly get out the shovel and big bag, and for in between proper shovel and big bag cleanings. We just found that we stay on top of it better if there’s a stash of salt easy to grab.

If you're not going to be creating a patio that it would block, a swing between the columns on the left is worth considering. Make sure there are spaces between the slats for water to drain or the wood could hold water, swell and become misshapen.

https://www.google.com/search?q=porch+swing&source=lnms&tbm=shop&sa=X&ved=0ahUKEwiKtNK6gMLZAhWK0VMKHWCiBQQQ_AUICigB&biw=1366&bih=650#spd=4656528558368085215&spf=1519593978684

Thank you all for your comments! Special thanks to DigDougsDesigns for the sketchup, including plants. We've had mysterious night time door bell rings lately, and the furniture and plants may discourage such annoying antics. Also, packages delivered to our front door would more easily be hidden from view. I'll post the final outcome as soon as it is completed. Thanks again!

Love the black and purple accents.