Actually no. There's not a single Pokemon that does it better than Snorlax. There's no Pokemon that comes in and 1-2HKOs Volcarona, Latios, Chandelure, Thundurus, Tornadus, Starmie, Latias, Vaporeon, Gorebyss, Reuniclus, Quagsire, Heatran, & Politoed while they can't KO back. Just to name a few, and that's just with Return & Pursuit. Yeah, Heatran gets handled by a few Returns unless it can burn Snorlax so I could care less about Balloon Heatran. Snorlax can fill the last 2 move slots with Fire Punch, Ice Punch, or Earthquake to body Skarmory, Ferrothorn, Gliscor, & Tyranitar respectively.
Fighting-types are a problem, but that sure as hell doesn't stop Tyranitar from being people's #1 choice. If you look at the list, what LOVES having all those Pokemon gone? Gliscor. What does Gliscor do for Snorlax? You see where I'm going.
Bad and underrated are entirely different things. It's by trying underrated things that we evolve the metagame.