Well that's kinda silly.
The odds of even three of Emolga, Pikachu, Raichu, Plusle, Pachirisu and Minun making it in are phenominally low while it's not uncommon for 5-7 first gen pokémon to come out of top every time. By your standards every one of these lists would have "variety". Iono, maybe it's because most of my favorites are spread about evenly across the generations (with slightly higher concentration in the first and fifth gens) I think a list that reflects that spread is automatically better.