Other forms: proselytizers
A proselytizer is someone who tries hard to convince others to switch to their religion or way of living. If you're constantly urging your friends to adopt a cat from the local shelter, they may describe you as a cat rescue proselytizer!
A proselytizer can be a religious evangelist, someone who believes their own salvation depends on converting other people to their religion. You can also use the word for anyone who is intensely focused on convincing you to vote for their favorite candidate or do a certain kind of exercise: "He's great, but he's an incessant yoga proselytizer!" Proselytizer is from the noun proselyte, “a new convert,” and the Greek root prosēlytos, “stranger.”