>>7805308While they did make a ton of figures, it wasn’t anything new for the company. Look at their TMNT and Star Trek lines. When Playmates found something that sold, they went all in back then.
As for most extensive, there are a bunch of lines that could be in the running. Playmates’ TMNT and Star Trek, Mattel’s DC and MOTU Classics, I think Hasbro might be the winner though. There are more Transformers figures than I care to even count. But I’m pretty sure the original three inch GI Joe line wins the “extensive” title. I can’t think of a line that has more unique characters, vehicles, and playsets.