Hm. Sorry.

I wear holes between the thighs of my jeans, too, have for decades, but the two pairs of shorts I'm thinking of don't ride up on me at all. They're both discontinued so I can't link to them - but one is a traditional nylon-ish V-notch short with a liner brief, maybe 4" inseam, and the other pair is a Brooks short with a wide waistband, flared legs on maybe a 5" inseam, and a sort of soft jersey synthetic fabric. Those need a brief underneath.

Anyway. sorry.