You could go white with a gray or black trim. Or red with white or gray trim. Actually, I can't think of a color that would not go with the roof and style!

No suggestions on landscaping, but what about a medium grey paint color, to complement the steel roof?

That looks like stain, not paint. I'd use a gray.

More brown ;)

Since you hate the brown, pick an off white from the stones. You can have the whole thing primed with white primer (probably two coats), then finalize your choices. If dust on windowsills is a problem, like it often is on windy farms, choose a medium tan (scoop up some local soil in a baggie to get a similar color) for the trim.

A much different color scheme would be sage green with terracotta trim. Or terracotta with green trim.

Another vote for off white which will blend with stone work and for any trim I would match the color of your mortar between the stones. Paint the garage to blend as well so the entrance is the focus. A soft blue or blue green for the doors would be pretty.

If you want guests to use the front door, enhance more of a clear path leading towards that side with a generous walkway from the driveway. Unfortunately the one on the side is closer.

For landscaping, find some hardy plantings or even ones that are a bit prickly to keep the sweet little creatures at bay. We used crimson barberry shrubs as a low hedge to keep our younger pup from having a hey day in our landscaped area.

Recently found pic below and I really like warm vanilla exterior with pleasant garage door and orange front door.

here is my mocking up