Check out this Korean guy, Eaguri (이구리). Incredible power and high notes
I first bumped into his channel when I searched covers of the song "She's Gone" on YouTube, and this guy simply blew my mind.
Here's the track:
I've found out that he's been putting some more newer songs, and below are the ones I like:
(I love this song!)
His powerful high register aside, he did his covers of She's gone and I'll never let you go (the latter seems tougher than the former) WHILE sitting.
Most of us know that if you are in a sitting position, you'd lose a lot of power and stamina than in a standing position...
Yet, this guy still nailed those two songs, seated, no less...