recurve6 said:
Retsupurae is the greatest internet achievement in history
Also, JonTron is hilarious and awesome.
This sounds contradicting to me... I know Retsupurae deal in LPs but JonTron seems like the kind of guy they'd hate... *shrugs*
JonTron is awesome though, found him through his top10 lists originally.
As for my list?
Lumin [http://www.youtube.com/user/talesoflumin] sits at the top, mainly an LPer and his glorious vocabulary, accent (South African), general innocence and lack of screaming/swearing make him a real joy to watch. He made the first Amnesia playthrough [http://www.youtube.com/watch?v=0MSo4ldhYOw] that hasn't hurt my ears too.
He takes his games slow and doesn't really know what he's doing, which is a nice contrast from all 'pros' you see who played the game before LPing it.
If you're in to League of Legends there are two channels that make some really [http://www.youtube.com/watch?v=HOq12mP0oEw] awesome [http://www.youtube.com/watch?v=0deA1JUUZFQ] music about it, Plentakill [http://www.youtube.com/user/LoL9Songs] and Area of Defect [http://www.youtube.com/user/AreaofDefectMusic].
Slamacow [http://www.youtube.com/user/SlamacowCreations] posts a lot of animated Minecraft videos, some music too (makes vids for things that Laura Shigihara [http://www.youtube.com/user/supershigi] cooks up, you should probably recognise that name).
And finally Harry101UK [http://www.youtube.com/user/Harry101UK] makes a lot of stuff between tests, demos and rather good VA impressions, he has a fair bit of Portal music [http://www.youtube.com/watch?v=cjtjiJdUpSw] (great [http://www.youtube.com/watch?v=Di2wDDwxqHg] stuff [http://www.youtube.com/watch?v=JZIVmKOdrBk]) and skits [http://www.youtube.com/watch?v=fyyetiHv-U8].
You could argue that some of these channels are too popular to be considered "underrated", but I'd be surprised if many people knew of all these.