Jinx, Cait, Kog, Trist, Varus, Ashe, Twitch during ult (aka teamfight Twitch). Basically the other hypercarries (Koggles and Tristy) outrange her and are still hypercarries.
Out of 17 ADCs 7 of them out range her and 5 of them share the same range as her (7 if we're talking Tristy lvl 1 and Twitch w/o ult) She outranges 4 ADCs.
That is short range for an ADC. Vayne's kit does not have enough damage for 2 ADCs, she builds less damage than other ADCs, she doesn't benefit from crit chance the same way other ADCs do. She has an abysmal early game in a meta of lane bully ADCs and she is susceptible to falling behind. Her damage boost is % max hp so if you build resistances against her instead of HP she doesn't shred you down as easily. A frozen heart (which lowers AS and gives armor) or a Thornmail (which reflects AAs and gives armor) are more effective on her than a Randiun's Omen or Sunfire cape which seem to be everyone's go to armor items.