Only counting full evolutions:
A: Archeops, Galvantula, Lilligant, Scrafty, Krookodile, Leavanny, Haxorus, Golurk, Chandelure, Volcarona, Accelgor, Braviary
B: Serperior, Samurott, Excadrill, Conkeldurr, Seismitoad, Scolipede, Whimsicott, Cofagrigus, Crustle, Zoroark, Carracosta, Garbodor, Cinccino, Reuniclus, Sawsbuck, Emolga, Ferrothorn, Eelektross, Mienshao, Druddigon, Bisharp, Genesect, Meloetta, Mandibuzz, Hydreigon
C: Watchog, Jellicent, Klinklang, Beheeyem, Bouffalant, Hetmor, Durant, Virizion, Herdier, Liepard, Musharna, Unfeazant, Swoobat, Gigalith, Zebstrika, Audino, Sawk, Darmanitan, Maractus, Gothitelle, Swanna, Escavilier, Stunfisk
D: Emboar, Beartic, Cryogonal, Cobalion, Terrakion, Simisage, Simisear, Simipour, Throh, Basculin, Amoonguss, Alomomola,
F: Vanilluxe, Tornadus, Thundurus, Landorus, Reshiram, Zekrom, Kyurem (all forms), Keldeo
I consider anything C and up a good design. B's are just C's that tickle my fancy. Archeops is my overall favorite of the gen.
