It is a doubting mmmmm. Off The Wall is better, but my personal opinion is that the late-MJ is a massively over-rated artist whose best work was with The Jackson Five.
I don't care much for post-Bad MJ, but the earlier solo stuff is very good, very polished r'n'b/disco with very decent average quality and some really, really good songs (Gotta be startin' something, say, or Burn this disco out).
I should say that, in my musical circles, MJ is an underrated artist. Most indie pop musicians and punk-rockers basically stare in disbelief when I say these things