Reluctant in what way? Like Mad Max or Die Hard or Clint? They're all ISTPs, I think.
I always liked the characters that had convictions about something, but were kind of weak or started off from a bad place. Daniel in Karate Kid, for example (not sure what type he is.. esfp or isfp??). My favorite character of this kind isn't even that well known, so it probably doesn't help. It's Simon from the anime Tengan Toppa Gurren Laggan (yeah, that's a mouthful).
Oops, I didn't mean to say I didn't like those other movies too. I just don't find them particularly inspiring.. They're just badass. It's funny how that works.. because I think the last 15 minutes of the Road Warrior is some of the best shit ever made. Or the last bits of Conan the Barbarian..he just fucks everyone up. But it's just not something that hits me the same way. Even Rocky would be more along my lines (the first one at least). That literally makes me kind of shed tears (ahem... or something.. shh I didn't say that).