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I used to view all of my server request logs in one stream with tail, but I didn't like tail's output because it broke it into many lines with "header lines" in between, so I wrote a small PHP script[0] to tail every file separately and output each line with a (shortened) prefix of the filename. Maybe it'll be useful to someone (who has PHP on their system).
[0] https://gitlab.com/Nicd/php-multitail
If you want... a fraction of the features, but still a nice experience, and you want a viewer in your editor, and if your editor is Emacs, try Logview mode - https://github.com/doublep/logview.
I mention it both because I find it very useful and because, seeing Logfile Navigator, I now see that it desperately needs to have more features :).
I found myself doing this as well and decided to write a simple tool to do it "automatically" for me.
You still can't use it with less, but at least it allows you to mark "segments" of the log without switching to that window and mashing enter.
https://gitlab.com/kevincox/watchlog
I'll add this timestamp to the set of defaults for the final v0.10.0 version later today.
Here are some example formats written by a user:
https://github.com/aspiers/lnav-formats
The documentation for the format files is here:
https://docs.lnav.org/en/latest/formats.html