Idk why but I thought of Twice. They are liked by almost all audience whether it's male or female, old or young, etc. I feel like they might have an equal ratio of fans male and female. I could be wrong tho, I don't really listen to them ;P
The only one I can think of is EXID. I see equal male/females at their fanmeets and chanting for them at performances. Another one is 4Minute but they disbanded :(