Honestly, I think Goku could make a solid Hokage… at least until he inevitably challenges every other village to a giant tournament “for training purposes.” That’s about the point where everything falls apart and the paperwork in his office starts stacking up like a filler arc.
He’d keep the village safe, no doubt; but the moment he gets bored, the entire ninja world is suddenly in a cross‑village battle royale because he wanted a good fight.