William T. Riker from Star Trek: The Next Generation. I know he's basically a meme now, the way Kirk is, but Riker isn't actually the himbo fratboy that people seem to think he is (also several instances of him being a "womanizer" are him being assaulted but people don't think of it that way).
Riker is intelligent, thoughtful, & open-minded, and to me he's always represented an ideal of safe and respectful masculinity.
He's clever, resourceful & beaten Picard in ship combat 3 times. I always felt like the Enterprise should have been his.
Also he's dated a trans woman & an immortal assassin, so that's also cool.
#FavCharacterAtoZ
