Midori Harada. I think I pissed her off on Twitter asking why she isn't included in the Pikachu V-UNION set - she dodged the question as to whether she's quit or didn't ask, and then expressed her continued annoyance at people asking her about the PTCG at all. It's a shame, because as a body her contribution to the TCG is a powerful one that has often gone such a long way to contributing to the feel of a set's theme/location/whatever well before BW's take on it. I'm an idiot for asking her though, it's not like I don't know how she responds to people.
I think Arita is the undisputed champ - TCG wouldn't still be around without him, imo - but Harada's my personal favorite.
