First off, most hit with the disjointed part, so no. If they are way too slow and mis-aim it is possible. What I like better is what I managed to do once, avoid the uair and loop around to rest them when they fall on top of you.
Now as for the topic, I am not very good at combos. Most of my matches are just WoP over and over. Because of this, most of my rests are indeed one-hitters, as opposed to what people normally expect. Falcon dthrows can be punished with rests if they misaim or are slow. Some Sheik throws can be punished this way at low %, even Peach dthrow. The problem is that the usefulness of this is inversely proportional to the skill of the player. Darkrain rarely spaces or times his knee wrong out of the dthrow.
Other great times to rest: a ducked, CCed, or sidestepped attack to hop-rest. Those are all fairly defensive in nature. Also I've been doing the tech-rests off platforms for years. You can even do hop-rests to missed l-cancels, especially moves like Marth's dair, though it's almost impossible to react to and you just have to risk it. You can bait out a roll and get them coming out of it. My favorite is when you can tech at and into someone and rest them when you stand up, though this works best with Marth.
Shrug. Just some ideas, but I doubt there's much there to help you. But yeah, I'm terrible at combos. >_< My play is pure WoP mindgames, which is why I'm boring.