I would love to collab with Markiplier and really get to talk to him personally, but I think more so it would be with The Creature Hub. I would love to meet these guys and just hang out with them for a day. Not only are they YouTube Gamers, but they do a lot of wacky things like fill a kiddy pool with 50 bath bombs, they stream for charitys and do crazy things like waxing challenges, one person got their hair changed green and dressed like an oompa loompa, someones eyebrows got shaved off, and constantly prank each other. They also just go places and hang out and do cool stuff to and record it. They seem kind of like a tight knit litle weird youtube family XD I hope its ok to post here, but you should check their channel out. they are pretty big but they are amazing. My explanations cant even describe how awesome these guys are.
https://www.youtube.com/user/thecreaturehub
https://www.youtube.com/user/thecreaturehub