I have an uncommon last name - about 3 families in the world with it as far as I can tell. Some asshole has been squatting <mylastname>.com for over 20 years an

I have an uncommon last name - about 3 families in the world with it as far as I can tell. Some asshole has been squatting <mylastname>.com for over 20 years and said he "hadn't considered selling it" then wanted $100,000 for it. The same guy has been squatting hundreds of domains since the 90s, many of them 1 letter off from major websites. What can I do against this scum? I saw that there have been many successful disputes against him so I was thinking of constructing one in a similar vein saying that his use of my unique last name to serve malware and ads is damaging to my reputation but it seems a little weak. Also no other TLD is even an option for an email address because people always assume you made a mistake and just send things to .com anyway in my experience.