There were concerns about Bannon, too. He was the one who courted Milo Yiannopoulos, and recruited him for Breitbart. Milo was never shy about crediting Bannon with making him a star. Milo was, for all practical purposes, the face of Breitbart until his sudden ouster.
If promoting a homosexual as the public face of an organization is conservative, then Bannon was conservative. If not, then he may not have been quite everything his supporters claimed.