My personal favourite is Broken Compass, but that's sadly out of print (and gone from DriveThruRPG). However, the successor Outgunned Adventure is still actively published and at least fairly close.
Indeed, it sounds like things will really wrap up now - Update #67 - Good News for the New Year.
I think I'll at least need to give the PDFs another look once they have been reviewed and officially declared final.
Greek mythology I encountered fairly early (I think I was 11 or 12) through a copy of Gustav Schwab’s book (and was absolutely captured by the stories). Nordic myths followed much later (early 20s), with my most loved book being the version by Tor Age Bringsvaerd.