Yes! BTOB are amazing!I don't know too much about them either but here are a couple of songs I really like from them:
Insane,
Imagine,
Come on,
Monday to Sunday.
I recently became more interested in Monsta X (their last comeback! ❤-❤), and I really, really like
Ex-Girl &
White Sugar from their latest album, hope you like them too!
For another group that'd fit well with the others, I would recommend BEAST/B2ST:
Fiction,
Breath,
Black Paradise,
Special,
Shadow.
I know from tumblr you already are converted to GOT7's fandom hehehe so I won't recommend anything from them :P So that's it from me, the only other things I could recommend are individual songs :(
.....and then I noticed you asked for this in March...oops xD Oh well, if you already know these/are done with your search, it might still help others :P