I’ve tried all the common methods, still seen no success with heavy pullers. What actually works?

So I get incredibly annoyed by pulling. I walk a lot of different dogs and have tried lots of methods and none have worked.

Be a tree: if the dog is a heavy puller, it just keeps pulling even when you are standing still. You end up waiting an eternity for the dog to give you slack. You can take a step back to create slack, but the dog usually just gets right back to pulling every time you move. So you end up stopping every 2 feet for the entire walk which sucks for both you and the dog.

Giving treats for being near you: the dog may pull less and try to be near you more, but if it sees a squirrel, smells something interesting, or just has a lot of energy it’s still gonna pull.

Turn around method: this usually results in the dog just getting slingshotted back and forth. You turn, they pull that direction, you turn back, and they pull the other way immediately. In the process you get the dog even more amped up which results in more pulling.

Gear (front clip, gentle leader etc.): makes pulling less annoying but doesn’t actually teach them not to pull.

I’ve tried these all many times, and they basically never work. I’m really curious to see if anyone knows of any methods to stop pulling that are humane and don’t take months or years to take effect.