You forgot about the bitcoin diamond, which is the last fork after the failure of segwitx2; first crypto made with proof of stake technology.
Yeah, I believe also this was the last fork after Bitcoin Segwit2x. What's next? that I don't know. Before I thought Bitcoin Silver was a hard fork but the last time I checked, I had read that it was a token which is an ERC20 based with name was just derived from bitcoin, tapos wala talagang official announcement na fork siya.