As in, just a new youtuber that got famous early? Maybe sylvibot I guess, I don't know how long it took most youtubers to start out :p
CeeBoop. Very new. The videos are.. Different. I recommend checking them out though :)
Here's a few of my all time favorites:
ATHLEAN-X
TheAtheistExperience
Frog Leap Studios
NUTV
CosmicSkeptic
Bad Lip Reading