I don't think Falco has any guaranteed follow ups off any throw (research required), but frame guarantees aren't all that. For example, in my practise against 20XX Marth, he can jump out of up-throw at any percent before I can connect anything, but that's not necessarily a bad thing. If your opponent leaves themselves jumpless trying to avoid a follow up on up-throw, you're then free to juggle them almost at will.
Most human Marths won't jump out of up-throw and get faired, as explored by PP.
I agree that more comprehensive research is required, but I don't think anyone is going to discover anything except "windows of viability" meaning small percent windows when certain micro-combos are available. The real gold is any viable window which can set up into a kill move. I will pessimistically predict that there are no true throw->kill move setups. That being said, throw->offstage launcher (f-smash for example) would be almost as good.
I think the place to start, at least for me, is D-throw. It should be the simplest throw to eliminate. Does anyone have hard info on who can tech D-throw and when?