This sounds like the Jack/Tiger argument that I've had with people. And the Arnie/Jack argument my Dad had. And the Hogan/Palmer argument. And the .......
And that's just in ball golf. Don't get me started on the Bart Starr/Roger Stauback argument that predates the Manning/Favre argument, or the Gretzky/Crosby argument, or the ......
Point is, the next generation will always be tough to compare to the previous generation. Equipment, training, competition -- it's all going to get better. Finding the GOAT is a futile exercise in a sport with a long history, forget something with less than 50 years on it like disc golf.