Well first off, can't stand pewdiepie nor do I enjoy most modern LPs in general. They all pull that stupid annoying "facecam" crap and always do that whole "please rate, comment, and subscribe" ****. I'll try to remember my favorites.
I know one is definitely Cypheron48. Found him early when he was doing his Banjo-Tooie LP. Haven't missed an episode ever since (though that'd be hard with how infrequently he updates): http://www.youtube.com/watch?v=NE3xEf5VMqE
Another is not so much a person as it is the one incredible arguably-best LP they ever did. Sonic 2 Special Edition: http://www.youtube.com/watch?v=RngA75CFd4Y
For a more modern LP, here's this gem from Ethos, Pause, and Vintagebeef: http://www.youtube.com/watch?v=ZSn747qs-7c
And this is likely my favorite Retsupurae: http://www.youtube.com/watch?v=nhhpf5GOvEA