please, use the search function in this forum and see the numerous threads on this topic, e.g. this one:
You can see from the numbers and lengths of the various threads that this discussion has been around for a while.
And quite honestly, I don't think that you get too many names together of composers that have published a lot of tracks and are still productive today.
Or the other way round: for those who are still productive, the intervals between releases are usually a year or so and during all that time of silence the entries for them clog up the list of the active ones - which would be a few.
If you already have a track by a certain composer, use that as a template, select it together with the files that need tagging and select the right name from the drop-down list in the tag panel composer field (it you have added that field there).
Or use the way of the "Format value" actions.