Is Zekrom an Event?
There are no North American Meloetta yet; it (she?) isn't out until March, it's now known. There is a Japanese one however, and I finally went seeking that for Pokédex completion after acquiring everything else.
As for legit., do you consider the Oblivia Deoxys within that? Some don't for some reason, but it's acquired through completion of a special mission or something in Pokémon Ranger. I got it via trade myself.
Wishmaker Jirachi is floating around as well, I might actually have two of those...
Thing is, I have all Pokémon and I think all of the events you listed (except an Event Zekrom and Reshiram, I have the in-game ones), including a V-create Victini (Movie14). So see what you can get elsewhere first from others who might need your event ones. I might want the Zekrom however as I don't have the Event one (Lv.100). :)