I only ever watch wifi battles and sometimes Nuzlockes on YT, so I'm not exactly knowledgable about names here. TheFlamingSpade is definitely up there for WiFi Battles imo, as is rchizzle. The single one I have watched enough to dislike is shofu. to me, his commentary is annoying. It's been a while since I clicked on one of his videos tough.
I like Chuggaconroy. He might not be a Pokemon specialist but he has a lot of let's plays. I also like Yamimash, and even though he's only done one Pokemon LP, I love playingwithmahwii's SS let's play. Hands down my favorite LP ever.
I am a big fan of the smaller guys. Black Light Attack, Hardytekyoyo and this new guy I found called Casual Kevin.
Each of them has their flaws but more or less I did their style.
My least fav is Shofu. For some reason, I just find him offensive. He does good quality and keeps up to date on Poke-news. But the cussin' and fussin' that comes from him doesn't let me sub to him. I have to watch him on a video by video basics.
Donnel is my # 1 bro. We fist bump, slay some risen, eat some chicken strips, bomb the Valmese and steal sugar from Gaius on a daily basis. Like a Boss. FE:A