Slaneesh isn't about pleasure or sensation. Slanneesh is about excess and obsession. Sex drugs and rock and roll are just the easiest ways to get people hooked. In WH40K, Slaneesh's chosen champion isn't a hedonistic frat boy or even a strung out junkie, it's a guy whose obsession with being a perfect swordsman led them to betray everything they ever claimed to stand for and eventually pick a swordfight they knew would kill them in the desperate hope they'd improve their skills just that little bit more before they died.

Jeff Bezos' relentless pursuit of wealth has gone far past the point where the wealth he accumulates has any real impact on his comfort or real power. His quest to accumulate hasn't stopped or even slowed with his hoard officially being the largest on the planet. To continue accumulating wealth, not only is he ruthlessly exploiting more people than he'll ever meet in his life, he's constantly seeking new ways to accumulate wealth, regardless of the real cost to humans, humanity as a whole, his home life, or the only planet whose air he can breathe. That's about as Slanneshi as it gets.