Stick 2.6 or 2.8 tyres will make a fair difference in height for you btw, that Giant I tried had 2.6's on, guy said he was thinking of putting 2.8 DH tyres on but those 2.6's were enormous. Udders may be able to point you in the direction of DH tyres possibly.
*EDIT you might struggle to get plus sized tyres to fit your bike ??
The tolerances on mtb tyres and frames / brakes / swing arms / mudguard mounts etc isn’t that great. You need to be very careful if you want to put wider tyres on.
I did change the tyres on my downhill bike to highly sticky tubeless ones. They were chuffing expensive.
I honestly can’t remember if they were wider though. I don’t think they were but will check next time I venture to my storage unit.


