Do they have to be vanilla vehicles? If yes, then I would say the H-Series. If it can be a mod vehicle, then I would have to go with the Ibishu Claria.
100% the Bruckell Moonhawk, since it's so similar to the 73 Chevelle Malibu which is one of my real life favorites.
Modern ETKs (ETK 800 has more of an edge and ETK K-Series), also Hirochi Sunburst. Including mods, Ibishu Mirena, Gavril Vertex, ETK S-Series, Hirochi CCF2 and Hirochi Sunstorm.
my favourites are the Bolide, T-series, BX-series and Barstow. --- Post updated --- O, almost forgot, the Bruckell Nine
personally my favorite is the etki series. mainly because its the only stable config i currently tuned, and i can do a 180 degree turn from 150ish mph by slamming on the hand break, sliding until im facing backwards as perfectly as possible, and then quickly tapping nitro abunch of times until the clutch engages and then holding gas until my tires stick and shoot my etki foward. ik it doesnt matter i thought id give a reason anyways