Mattias is Lowkey one of the actual best shredders to ever do it.
Unbelievable cleanliness, crazy knowledge of the harmonic series, basically is a metronome.
He's 100% on my top 10 list.
Somewhere on YouTube there's a >hour long video of him just fucking around. One guitar, DI into an amp, at some small guitar store. And it's straight up mystifying. I used to watch it back when I played like 5 hours a day.
Easy find: https://youtu.be/Vxq0xvSJojw
Basically 20 year old video. Dude is a straight up wizard today. Up there with Guthrie.