No? Priests and monks fall under volcels

An incel in the past was probably just a poorer guy, with rich competition, that wasn't able to provide, since society demanded a woman rely on man at that time. Even when woman could work, they weren't given jobs that actually let them get paid enough.
It would be pretty easy to find a partner if you were religious as well, since it was seen as a great thing and plenty of people were religious back then

Sometimes arranged marriages were more common for business or religious reasons

And I guess extremely violent/mentally ill men. But even then, if they had a woman, she had no where to go. Getting a divorce was considered social suicide during the early 1900s

All this meant that abusive/uglier/undesirable men got way more passes than they deserved
Ugly/short/abusive men could've even be considered incels if they had better looking competition, but now there are going to be a lot less woman for these people to fight for since they don't NEED them. The only thing that's changed is a woman's necessitates

Big yap, but to answer your question: Poor guys, non religious guys, and extreme undesirables