While those are some of the best moves, I think some could be coordinated so...
Neutral B - Falco's laser
Up B - Samus (out of shield option)
Side B - Missiles are really good, but for combo options I choose Falcon.
Down B - Jiggly
Nair - Of the sex kicks, Samus' is huge and has good knockback, but with Marth's fair, for this build I think I'd want G&W's parachute, as it's pretty baller.
Uair - I think Sheik's is better, but for juggling purposes I'd pick Fox.
Fair - Really a tossup between whether you want to be able to poke them out (Marth) or knock them out (Falcon). If I had Marth's fair, I think it could combo to Jigg's rest quite nicely.
Dair - Falco
Bair - I was going to say DK... but I think I change it to G&W.
Jab - Ganon
Utilt - Fox. Would be a perfect tilt for a rest.
Ftilt - Sheik
Dtilt - Marth. pokey poke. Although... Samus' has a really good popup... I would want to experiment with Samus'.
Dash attack - Peach
Usmash - Pikachu. nice call.
Fsmash - Marth.
Dsmash - Peach.
Grab - Marth
The idea is that the moves would basically combo and pop the opponent into rest kills, but depending on your playstyle, I think the nair or bair could be switched out. To be safe I'd probably actually want Samus' nair and DK's bair, as they come out quick and hard, even though the parachute covers more space, and the turtle pops up more, potentially for a rest combo. Fox's uair could potentially juggle into a rest, using only the first hit. Falco's shine and dair works perfect.
Basically Jigg's rest makes this a killing machine.
(thanks for allowing me to waste time while I wait for family to switch gears here..)