Huuuuuge fan of of Block B (And Bastarz, and Zico's solo work). Also recently really into Akdong Musician (AKMU).
Plus I listen to a fair bit of BIGBANG, VIXX, BTS, EXO, SHINee, BAP, SNSD, Miss A, and a handful more I can't think of off the top of my head. xP
Don't really have a bias per se, but my favorite artists out of those are probably Zico, Ravi and T.O.P.