welcome. These are all the groups ive found, I do listen to groups more than other so I'll just name all the ones I've stumbled upon.
bts, mblaq, teen top, block b, b1a4, 2pm, vixx, winner, super junior, shinee, got7, nu'est, big bang, btob, exo, infinite, bap, seventeen, uniq, ukiss, ze:a, snuper, jyj, ikon, day6, up10tion, road boyz, rain, se7en, b.I.g, myname, beast, n.flying, cross gene, 100%, romeo, alphaBAT, ft island, a6p, history, vav, 24k, 2am, ajax, legend, boyfriend, cnblue, h.o.t. debuts to wait on are sm rookies and astro. Astro has a drama though. my personal fav is seventeen and others as well. Here are some that ive stumbled upon since I became a fan.