I think that honor should go Amid Evil, made by a sub group at New Blood Interactive (Known for retro shooter Dusk).
Fun fact: One of the guys working on this is El Zee. Why do i mention this name? Because he made the excellent, and also free to download Zdoom game Return Of The Triad. A homage to the original and its GOOD.
Links:
Hey! Give me a call through PM and we can discuss some things regarding this - I do have a few ideas up on how that kind of thread should be like (Seperate categories and all). Could be a catch-all thread for all things retro Doom.
Will await your PM :)
It should run with a GZdoom based port and some command line parameters. However, i do think the ports currently available use a less recent GZdoom build than is required by the FAQ.