Would be tempted to fit a 2.5 EXO DHF or Ardent EXO 2.4, either way the widest, tallest, fatest tyre you can fit. Oh and a new pump, and or pressure guage. We’re all assuming your running 40psi however the op shows the accuracy of the guage is not known.
Re: Your tyres.
Highrollers have a short tyre wall profile (they’re not particularly high volume), they’re not as tall as either of the above.
Snakeskins are crap