Doo "Steal Your Ho" Choi.
One youtube commenter with this name disappeared not long after he lost against Cub Swanson. 2017 to 2018 mma youtube channel has a lot of commenter with mythical fighters name. Doo Steal your Ho and Sea Level Cain is the guys I see the most lol.
TRT Vitor is a close second for me.
Overseas Fedor. He beat all these pride UFC wannabees.
When he came to the US, well.....