I wouldn't do angels with tiger barbs. I'm glad to see that some here are able to do it with success, but every time I've seen it or read about it, it's a recipe for disaster, especially since the tiger barbs are in there first - the angels are going to by shy and timid when you first put them in. They won't have staked out a territory or anything yet and they'd be more likely to be targets of the tiger barbs. If you get large angels, it might work better but the best way to get angels, if you don't get a mated pair, is to get a group of 6 juvies and let them pair off on their own.
Instead, maybe some rainbowfish? They get to a nice size and have lots of color. Boesemanis can be beautiful - the Turquoise are really nice too.