Switches all the time so I'll have multiple ones per number but:
5. Alternate History Hub/Real Life Lore & sometimes Company Man
4. TJ Kirk or Cinemassacre (when James makes AVGN vids)
3. PBGGameplay (When they're on their hardcore series season) but when not: Shesez
2. Ashens
1. Vinesauce Vinny & Joel stream uploads
Honorable mentions: RedLetterMedia, Jim Sterling, Angry Joe, Jeremy Jahns, Penguinz0, Projared, VSauce, Buzzfeed Unsolved series and their food version of the Worth It series, Shoe0nHead, Hello Greedo, and Larry Bundy Jr.