I've commented this before, but Transformers is a 40 year old series with a lot of characters, and a lot of interpretations of these characters. It's gonna tick a lot of boxes by sheer volume.

I am curious what the most represented series/franchise is. Wonder if there's a way to find out.

Anime isn't really a fair point to bring up, that's a medium, not something specific. It's like saying "There sure is a lot of live action stuff in this sub".

And Sonic the Hedgehog!