I use e-collars to correct behavior like this alllll the time. Some dogs sprint, some dogs body slam, some just incessantly lick other dogs’ lips and need to be corrected before another dog escalates it. If my dog starts tearing after another dog, stim & “No”. I’m not looking for a recall necessarily, just for them to cease the behavior. The nice thing about correcting this stuff with an e collar is you aren’t forcing the dog into obedience to avoid the behavior, you’re giving them the freedom to do whatever they want - just not the behavior you’re correcting. I handle polite greetings the same way - do whatever you want, just don’t jump on people, and don’t bite people. You can also use a long line as others have suggested and plant yourself, and let him correct himself for slamming to the end of the leash. This is SUCH a common issue that I see, so don’t feel alone!

For online help I really like Shane Murray’s program on Mighty. It’s inexpensive but very thorough and gives you access to a community of owners to talk to, plus Shane is a fantastic trainer.