Well, to start, almost anything but fascist. I think being non-globalist is literally the only thing in common. About the only description more incorrect would be to call him a communist.

Bannon sure doesn't sound at all like Mussolini describing fascism. Think about who in the modern world comes closest to agreeing with what Mussolini says:

“All within the state, nothing outside the state, nothing against the state.”

“I declare that henceforth capital and labor shall have equal rights and duties as brothers in the fascist family.”

“God does not exist—religion in science is an absurdity, in practice an immorality and in men a disease.”

It's definitely not Steve Bannon or anybody associated with him.