I second using sonarr/radarr, once imported it detects episodes and lets you one click rename to a specific format and folder organization.
If you don’t want any of the other features of sonarr/radarr (like having a way to filter and manage your collection to see what’s in what quality or from what release group, searching multiple indexers with a single search, being able to send a specific search result to a downloader and have it automatically imported and organized when complete, or have auto downloading based on requests using scoring rules that you set), then there’s also filebot which a lot of people seem to like and seems to be just for matching with online metadata and renaming.
But I haven’t tried filebot since I like the extra features and capabilities of sonarr/radarr. It makes it easy to manage several library folders like an archive for anything that’s been reviewed, is complete, and in a quality/codec that I’m satisfied with, and keeping track of currently airing shows in my active folder which is where I also keep auto downloaded stuff I haven’t reviewed.