Tie between Tyranitar and Dragonite, since the two of them are completely different beings :]
If Slaking is pseudo now, then so is Snorlax, because that's what Slaking is ripping off of. Salamence is cool, because he achieves what Charizard wanted to be, but he needs to lose a little bit of weighttttt, since in his case it's not "more to love" it's "more to eat you alive with"! Metagross has an epic and original design, but he's like the bane of my existence. Everyone on the planet uses him, and he's a very effective counter to most of my common team members, so I'm bitter towards him. Oh, and Garchomp? He obscures Flygon, and I'm bitter for that, too, because Flygon is so much cooler. Pokemon has yet to achieve "shark done right".
Basically:
Dragonite: More to love, cute, and happy :]
Tyranitar: <3
Salamence: Awesome, but scary D<
Metagross: He beats me up too much for me to like D<
Garchomp: He beats Flygon up too much for me to like D<