I have a tiny salmon faverolle hen that lets my gigantic barred rock rooster mate with her sometimes. He is always super careful, so it may work out fine with them.
This sounds like pretty normal rooster behavior, sadly. Personally, I would separate him into a place where they can still see each other. Let him out after a couple days to a week and see if he is any better. He will probably chill out when he has more hens to mate with, too.