2) You can also do tipman>DJ dair, tipman>tipman etc. I've been working on tipman>Dark Dive for a flashier edge guard against characters with not great recoveries
. Stomp is always fine, but a lot of smart people aren't going to come directly from under the ledge against Ganon, and if they do, a lot of characters recoveries are fast enough so they can cut through you before stomp comes out. Tipman has more range and screws a lot of people up as well as leading to DJed stomps, b-airs and moar tipman. Also, a f-air right off the edge is always nice.
1) As for getting on the edge with Ganon, he has a little trouble due not only to the lag of his aerials and low edge hop, but also because he suffers landing lag after grabbing the ledge with Dark Dive/Gerudo. Ledge jump into Wizkick is always fun for starting Ganons but its gunna get predictable and extremely punishable really very quickly. You also have ledge jump into Gerudo which is a nice tactic but be careful of spacing.
His ledge attack under 100% is really nice. It has crazy range, can poke under shields, and looks like it has a f*cking disjointed hitbox (I've seen it hit people even when Ganon's fist stops like half a character length away). It's also decently fast, and when it connects up close, it puts them over the ledge for edge guard.
You can ledge hop all of Ganon's aerials except n-air. But like I said before, his aerials have very bad lag, so use them only when you think they aren't going to shield. He can also airdodge after ledge hop straight into a standing position on the ledge, which is really nice. But be careful because if you grabbed the ledge with UpB or Gerudo you're going to get a delay.
Hope some of that helped.