ZE:A debuted in 2010 and honestly they are kinda "nuguish". Most kpop fans nowadays probably have not heard of their name before and even during second gen era, they weren't that popular either. But with that being said, their members individually are very popular and a good number of people would know who they are.
Park Hyungsik and Im Siwan are literally among the most well known korean actors and has starred in very succesful dramas like Strong Woman Do Bong Soon, Happiness, Run On etc etc. The list could go on for a long time honestly. Both has even raked up many awards including one from Baeksang Arts Awards.
While for Kwang Hee, the kpop fans and korean gp might be more familiar with him since he's more involved in variety shows, including weekly idol and Infinite Challenge. Kim Dongjun which used to be the centre of group is also popular among gp. These 4 members are all very well known be it in korea or internationally yet it's seems like they're popularity didn't go back, not even SF9 or ASTRO level.. They're literally the definition of nugu back then.
i just wonder what will happen if they decide to reunited now, will they finally manage to reach success as a group ?