It's all personal choice really, but I (personally) woulden't put tiger barbs or danios in a 10gal, they are really active fish and prefer alot of room to swim around, plus tigerbarbs are much better when in groups of 6+, which won't work in a 10gal.
I suggest one centerpiece fish (Ram, Krib, dwarf gourami, betta etc...) and 1 small school of small bodied tetras (Neons, cardinals, glowlights, etc...). Few otos can be added as well, they are the best little cleaners and add virtually nothing to the bio load.