Espeon and Vaporeon are the only ones that are any good this gen due to Espeon's high Speed, Sp. Attack, and its DW ability which which bounces back and status move aimed at Espeon. Vaporeon ha great special bulk, is a good Wish passer, and is a great staller with its DW ability, Rest, and Toxic. For me, the best one has to Vaporeon only under rain, otherwise, the best is Espeon.