After keeping angels before, I would not keep them in any tank under 4*2*2 ft in size and would ideally want a larger tank.
For a 61 x 41 x 58 cm tank, I would go for..
* 6-8 Corys (or more if I decided on dwarf or pygmy)
* 10 smaller mid-water schoolers (neon-sized, ideally)
* pair of dwarf cichlids (Apistogramma, for example)
(* maybe 6 small hatchetfish, once you have some more experience)