Specifically, tongue-and-groove, channellocks, water pump pliers. I started working in the trades and have come to the realization that channellock pliers are the most used tool for electricians, plumbers, and HVAC. I don't know how they'll work in the home environment, but when gripping pipe, turning a nut, these pliers have basically replaced the adjustable wrench in most environments.
Channellocks makes the original. Knipex makes their cobra version, which allows bettergrip. I have a smaller Klein I bought in a set (which has its limitations). Milwaukee has their version. And so on.
I'm just starting out, so I've got more to learn. But from my knowledge, no other tool is more often used.