I like these colors below with brick-- I know the last pic is a very different style, but I think the gray-green looks great with brick. I don't think I would do the scalloped shingles in the gables. I think they are Victorian, and your house is more Colonial Revival/Farmhouse. I think if you want to do an accent in the gables, I'd do something in board & batten, or turn the siding vertically in the gables, with a trim board between.

I’d match the garage doors to the siding or stonework. Why make a feature of something so large & utilitarian? Their size would dominate & draw the eye away from the front door, which for me, should be the key point of focus. 🌈

Sage greens would be one choice nice with your roof color, or at least how it appears in your first photo. Soft white for the trim. Something like this Saybrook Sage (from Ben Moore) might be an option.

Why not re-stain the wood - same rich coffee color as in your #2 pic. Wood has a richness and depth to it that you cant get from a plastic solid color paint film and since its already not painted its not as if any extra effort would be needed - just need to find someone who has exterior wood staining as part of their repertoire. You could switch it to a charcoal gray wood stain and then re-do your deck/railings to better harmonize....