To me, Dreamhost stands out as the sole player that has (mostly) avoided becoming scummy when it comes to shared, managed hosting services. Probably because they're independent and employee-owned.

I was a happy customer for ~2 decades. Only recently left because I simply have no need for their services anymore (and frankly, haven't for years) due to having an assortment of VPS and dedicated server instances running around the globe at any given point in time nowadays.