Is this too much for the space?

I have a little raised brick area by the side of my house that is approximately 28 ft long and is about 8 ft wife (the usable space between the brick wall and the gravel area which is next to my house). Area faces southwest. Are four trees too much for this space? My plan is to have wildflowers and/or cover crops interspersed throughout the open areas. The raised bed is narrow but my plan is to shift my garlic and onions (and/or beets) into this bed. Appreciate any thoughts on this!

Located in 10b