So many will say kill, if you dont want to make avseperation pen for him, a mini run where you can care for him from afar and you can still enjoy your hens
If a rooster isn't backing down,he won't until you scare him, I don't believe in violence like kicking or sticks (unless to protect self)
When I had mean roosters I used the hose or a high squirting water gun, they hate it, run and soon will fear just tge site of it , you usually only have to use it once to create the fear and bring it out when poor behaviour starts
Keep in mind this is my opinion and experience only
And I did cull my mean roosters eventually it was too stressful and now I have sweet boys who I hand feed and only need to snap my fingers to stop rowdiness