For a time GZDoom was uncontested, but for years now the developers have made it worse and worse and they show no signs of changing course. You do not find it disconcerting that Golden Souls 3 can run slower than 60fps?, on hardware released 20+ years after Doom's original launch?. The GTX 760 may be 10 years old, but it's still a lot newer than Doom itself, which ran on an Intel 486 with a few megabytes of ram. Golden Souls 3 shouldn't be so demanding, but it is.
I have been playing an MBF21 wad called "Ad Mortem", and it does a great job of providing a more custom experience while being playable on better engines, at far more than 60fps. I believe you can do a Golden Souls game that targets that specification as opposed to ZDoom, and still allow it to stand apart and show your talents as a game designer. Even if it's a one or two level demo, it would be cool to see!.