No, there aren’t, actually.
All Sailor Senshi are females. I believe Naoko Takeuchi confirmed this herself somewhere (but I can’t exactly remember where). In the manga, the Sailor Starlights were female all of the time, but they preferred to dress in male civilian clothes. In the anime, the Starlights were males in civilian form, but female in senshi form. So even in their “sailor” form, they were still female.
Mamoru takes place of what would be Sailor Earth, but he is not a Sailor Senshi himself.
Hope that clears things up :)