Mecheon
Sacabambaspis
Well, 4E's Dragonborn stuck around because they were better than 3.5E's version of DragonbornBesides Dragonborn though (and I don't know how they managed to sell people on the crappiest interpretation of dragonpeople to ever be thrown together), I don't think it worked.
Because 3.5E's Dragonborn were kind of weird.
Honestly I think the only really original races 4E came up with were Shardminds and possibly the Deva and Vryloka, but Deva and Vryloka are both from mythology. Everything else was legacy