Ok. So, going by the clue:
MCU movie last 5 years, 2018 to 2023. Character is a He. Creative parts usage. Has never had a minimate.
MCU releases since 2018:
Black Panther, Ant-Man and the Wasp, Infinity War, Captain Marvel, Endgame, Far From Home, Black Widow, Shang-Chi, Eternals, No Way Home, Multiverse of Madness, Love and Thunder, Wakanda Forever, Quantumania. Please correct me if I’m missing something.
I was thinking it might be Man-Ape, but, we did get M’Baku (if that counts). The unconventional materials is where I’m stuck. I think that rules out most characters coming to mind.
So, out of left field, my next guess is Razor Fist. First appeared in 75. Doesn’t have a minimate. He’s a him. Unconventional materials for the sword hands.