Actually, you don't need EU to find this out.
All you need is a copy of the Behind the Magic disc and you will have your answer when you look thru the script, which is canon, only surpassed by the movies themself.
Perhaps you are right though, it may be alittle far out there on the border.
Still, since I've given a hint already now, let's keep the question open for alittle longer.
Yes, the Avenger is one of them.
Hmmm, I think I better pop in the cd myself, I just realized I've forgotten some of them myself.