This would be a good time to learn how to L-cancel!
Using Ganondorf, abuse them with F-air, D-air. edgeguard with B-air and reverse U-air.
Dorf's slow falling speed may make it easier for you to get the hang of L-cancelling.
Remember, you don't have to activate the "digital click" of the shoulder button to cancel your aerial - the shielding in melee is analog.
edit - peach might be good too. abuse downsmash, and do F-air when floating close to the ground. as the hitbox comes out, let go of the float. Try to time it so that immediately after she swings her crown, you hit the ground. Then downsmash. The effect you're striving for is a "float-canceled aerial," which, if timed correctly, will have just 4 frames of landing lag, so the downsmash should come out instantly.