I would stick with SA dwarf cichlids for a 26. Rams, apistogramma, maybe one keyhole or something like laetacara curviceps would work. Even a pair of discus is out of the question IMO (which would be your only option for keeping just 2; most discus keepers recommend either a pair or 5+ due to the way they establish their pecking order). With proper care they have the potential to grow far too large. If memory serves me, the 26 BF is a 2' tank, similar to a 20H but taller... I like to keep angels in a minimum of a 29 gallon tank. Adult angels reach a pretty good size as well.
Tanganyikan shell dwellers are cool fish and would do nicely in a species colony setup. Lamprologus ocellatus "gold" are one of my personal favorites.
Kribensis are African riverine cichlids and would also do well. Their water chemistry and tank mate selection are similar to SA dwarfs.