I've met CHOOCHOOSGAMING, MCClimax, iBallisticSquid (2 times) AmyLee33, WeeWeeGaming, FearADubh, Stampy, and TYBZI.
I've seen Bajan Canadian & Jerome ASF because I was in a hunger games episode, OhTekkers because he raided me on a factions server, StitchYT when I tried to help him win a hunger games and finally Kyrspeedy on his minecraft server in a skywars match. I used to be a pretty big fanboy of these types of youtubers.
I have seen Deadlox, Hbomb94, Parker_Games, ChooChooGames, BajanCanadian, Stripethedog, Bodil40, and MunchingBrotatoe. Honestly if you play a variety of servers you will find them easily.