I can think of one immediately that may fight the US for that title…

Without a doubt.

I felt the same as you. Here’s how I managed to deal with my piles of accounts: get BitWarden set up, and pick a few main accounts to enter in and generate new passwords for. Delete your login data and cookies from your browser, then add accounts to BitWarden and generate new passwords as you come to need them. That way it’s one at a time not all at once. Made it manageable for me! (BitWarden even prompts you if you’d like to save a login if it’s never seen it before)