Jinbei is much a better leader of men than Zoro. Zoro isn't really a leader type, he'd be more like Mihawk if he didn't run into Luffy.
Zoro is a leader by example. He doesn’t demand that others follow him, but they do because he’s capable, pragmatic and able to make use of the resources at his disposal. He was responsible for conducting negotiations with King Neptune and the Scabbards, gladiators and even Fujitora followed his lead in Dressrosa. What Jinbe has over Zoro is his years of experience and his strategic mind, which Zoro isn’t even that bad at, he was the one that suggested that it was tactically unwise to fight two Yonko at once. He also spontaneously came up with the anti-Pica strategy to save King Riku with only moments to spare. If Mihawk’s leadership is anything like Zoro’s, let’s just say you will be better off under his captainship than say someone like Kidd or even veterans like Moria.
Would Mihawk/Zoro be a popular leader? Debatable.
Would they shoot out world government bases screaming about nakama? Probably not.
Would they be capable, clear headed and act in the crew’s best interest? Yes. Any crew captained by Mihawk or Zoro would undoubtedly be a success.