JackSepticEye
TetraNinja
CaptainSparklez
Minx (TheRPGMinx)
Cryaotic
TheOdd1sOut
JaidenAnimations
X33N
Direwolf20
VanossGaming
MiniLadd
I AM WILDCAT
Mr.Fruit
BlueWestlo
Brackeys
AllTime10s
101Facts
CypherDen
Elajjaz
LEMMINO
pixlpit
(some more but too many to mention..)
((Not to toot my own horn but i think i'm fairly decent ^.^))
Personally, I watch CuteFuzzyWeasel, BionicPig, ElvisTheAlien, occasionally iDubbbz when he isn't questioning his will to live, Mr H Reviews and some creepypasta YouTubers when I want to hear someone get angry over bad stories.
Pretty much the entire Roosterteeth family, Game Grumps, M3rkmus1c, Simpleflips, Dude Perfect. I also really like a bunch of people that make montage parodies, but those seem to be dying down as of late.