First of, I work in IT Security so I post this coming from experience. What a lot of people are missing is that Epic should be your BROWSING browser. You know what you're getting into with sites you log in to (and, since you're logged in, they're tracking some information anyway). Chrome or Chromium with all your favorite extensions should be your TRUSTED SITES browser. In other words, checking email or social media? Chrome or Chromium. Performing web-searches, browsing websites, viewing cat-pictures, etc.? Use Epic.
LastPass is not all that secure compared to KeePass, the reason is KeePass saves your password data to a local file: you have to manually schlep it around to get it on your other devices unless you're using an extension to link it to Google Drive or something like that. Even then, you're still determining where your password DB gets sent. LastPass is automatic, syncs your passwords to the cloud. I use LastPass and KeePass, for entirely different sets of passwords, and the last thing I want is either of them touching Epic. It's not that I don't trust Epic, but really, Epic's greatest strength is protecting you against privacy threats from casual browsing. If you're truly paranoid you should probably be using a VPN and TOR, with Epic (as it is) anyway, and not using a password manager (much less a cloud-based one) to store your passwords. Figure out one password and someone has your entire credentials list. And even then, the moment you authenticate into something you've kind of defeated the purpose of private browsing.
Add me to the small informed chorus of folks suggesting that the Epic staff not start adding a bunch of plugins. And to the masses here that seem to insist on plugins, make a choice: Privacy, or Convenience. You cannot have both.