The mad titan is one of the coolest action figures we own. This was released by Marvel Select (and not Toy Biz) years ago. It came with a removable glove that holds the Infinity Gauntlet. It also came with Thanos love, Death.
We own two version of Apocalypse, the taller being of course the coolest. And there is that other character in between them, which I sadly forgot his name.
Probably the coolest animated TV series when I was a kid was Goldorak (Grendizer). The series was finally released on DVD here (I have to get it) and there are always tons of awesome new action figures coming out.
HL Pro recently released the very first images of their upcoming Hydargos figure.