Go for ones that stay low and out of the way, like 2" creeping thyme or clover! Or ones that you can eat, like greens! Or ones that have great mineral profiles once composted..like comfrey, borage, etc.
I've done butter lettuce, red lettuces, garlic, heirloom peas, and most recently, even avocados and strawberries.
The lights strength / penetration and heights of plants might help sway you.