I didn't bother reading all the pages, but I figured I could put in my two cents here, and hope it isn't redundant.
I have found G&Ws edgeguarding to be near the best in the game. His fairs and back airs come out very nicely. Fox, Falco, Wolf, Link, Toon Link, Samus, ZSS, Ganon, and Peach are easily gimped by G&W's fairs. It may seem scrubbish, but all you have to do to gimp the above characters who are slightly above, even with, or slightly below the stage is jump down and fair, use your second jump, fair again, then Up-B. At any percentage, 0-999, this will put the above characters too far from the edge to get it. It's pretty sicknasty, and it's very hated among the members of my crew. It's simple, it's flashy, and it's guarenteed. What more could you want? I actually recommend this tactic more than any other on FD, because you're two far out to get stuck under the platform, and you generally float left to sweetspot. Just don't forget, you can't Up-B again. I forget this sometimes, and do stupid shi7 for the SD.