Reb Brown.
Not a word of a lie here, I genuinely wish he went further. Sure, Italian B-movies are nice but I absolutley hate his appearance in Death of a Soldier; the title of that film made me think it was going to be something serious, instead it just ends up being unenjoyably bad. Also, none of his other action movies appear to be as brilliant as his outings with Mattei. A shame, I also think the guy wasn't *that* bad of an actor, certainly better than Schwarzenegger and possibly even a bit better than Stallone in some instances (in fact, Hercules in New York should have been an Italian film with him as Hercules rather than Arnie, with Luciano Pugozzi playing Zeus, it could have been in the same vein as Bud Spence and Terence Hill flick).
Richard Harrison.
Seems to be remembered for his films with Godfrey Ho, I have to feel sorry for him for this, along with his work done in the Philippines. He really should have stayed in Italy, because before going to East Asia he had a fairly respectable career that seemed to go straight down the pan with his numerous appearances alongside drug smugglers and layabouts.
Michael Sopkiw
Another short-run American star of Italian cinema, Sopkiw did a grand total of four movies before leaving the film scene when he probably could have done more. Good looks, some decent acting chops for someone who wasn't an actor and the ability to do screen fights well, it's a good thing all four of his movies are memorable.