I'll second the Black Currant, actually vaping it right now. Has a nice fruity taste, but can be a little "tangy" by itself, which is one of the things I like about it. I've actually mixed it half-and-half with the Parma Violet before and it wasn't too bad a combo
For a fruity mix, it would probably make a nice accent flavor (as in just a little bit of it in the flavor mix).
Apricot is okay, as well, though a subtle flavor and may not mix well with some things. No real sweetness to it. I still haven't experimented much with mixing this flavor with others
I can't really comment on other fruity flavors right now, but I have several on order that just shipped today