Without a doubt, Ive been sexually harrassed at work. Who would be responsible?

I have plenty of proof with emails and photoshop pics of me naked. I turned them over to yhe G.M. who didnt do anything. I work for a smaller company that subcontracts for a much larger company that the harrasser works for. I am housed in the larger companys facility, with the harrasser. When I finally had enough, I told the harrasser to stop or I would take action. He went nuts and quit. The owner convinced him to come back. but the harrasser had the condition of coming back only if I left. I made him uncomfortable. I was transfered immediately. I forwarded some emails to my boss, who forwarded them to the bigger business owner. They both agree that the harrasser is sick, but thats all. I know he is a more valued employee then me, but this cant be legal can it?