I get you don't like LS (and get that folks here like their engine designs), but they are what GM engineers went with like 23 years ago, so it's not like we have a choice if you are shopping for a newer full-sized vehicle.
We just got back from a family vacation in my wife's '20 3500 Express Passenger van. It has the L96 or something like that Gen IV LS 6.0 with the 6L90e. The last 6.0 in a production vehicle, I believe. Vans are old school, I'm pretty sure you know that.
For reference, my options shopping around were the Dodge Promaster and the Ford Transit, both unibody and V6 options. The Chevrolet LS 6.0 was the obvious choice. And I had been slowly transitioning from the SBC from the LS anyways.
I had driven it only a few times around town and didn't like it that much, mostly because of the 6 speed, but after driving it like 1200 miles into the Rockies, I'd say it's pretty dang nice. Even with as heavy as that darn van is and the wife and kids packed and luggage, it stayed into the low 2,000 RPM range. The few times it did go above 2,500 rpm, it felt plenty powerful, smooth AND quiet. I honestly have zero complaints of it and never felt under powered, even in mountains. I had to set the cruise control AT the speed limit because I found myself speeding a few times...
My 5.7 in my k3500 feels like it's going to blow out of the hood above that range, and really doesn't do much above that RPM anyways, so I never really push it...about the same as I recall with the older Express vans I got to drive (pre-LS) on family vacations when I was still living with my parents. So I apologize, but I find these gross "LS suck" statements almost comical.
Oh, and no distributors/goofy spider injectors to worry about misfires and no-starts on the LS.