User blog comment:A Graalian/Who would you rate the hardest Zombie in PvZ2 and OP plant in PvZ2?/@comment-1764483-20150406135259

I'm not counting combinations. Also, how is Citron OP?

Between zombies, either Wizard Zombie or Octo Zombie. It depends on the situation.

Between plants... Ghost Pepper? No. Fume-shroom? Perhaps, if the buff remains. I've ruled out Spring Blover PF, so... Sun-shroom, I guess.