Mostly just clean up crews with my angels these days.
Cory (several types), Loach; clowns, kuhli or gold dojo, Ansistrus (bristle nose), Otto.
In the past I've kept both male and female betta and the larger tetra species.
Peaceful fish of you're choice that won't fit in the angel's mouth should be fine.
The Fraternity of Dirt
If at first you don't succeed,,, keep kicking it
2-75g planted, 5-55g planted, 5-20g planted, 110g w/30g sump, 8-10g,
2012 update adding table top pleco pans & a 90g (Nutz)