BoxRec

John L. Sullivan versus William Muldoon
Muhammad Ali versus Antonio Inoki
Archie Moore versus "Iron" Mike DiBiase
Butterbean versus Bart "the Hammer" Gunn

Anybody know any other legit boxer wrestler matches?

Leon Spinks fought Inoki back in 1986 as well as various other boxer/wrestling matches in Japan. I think Leon's done the most of those over there.