I haven't used Eeveelutions in any of my runs but I would say Espeon will be great for Rejuv, Magic Bounce can prevent gym leaders from setting up hazards, Vaporeon has a hard time early on but will be valuable asset to major bosses because of its tankiness, so as Umbreon(not using it often to judge), Jolteon is also good because of it outspeeding gym leaders and important NPC fights with single weakness. Flareon and Leofeon are in odd places as they are mainly physical yet their typings are more towards special set, but as i said i havent used any of them well enough to judge either. Sylveon is good especially for special type like Narcissa and Valerie for special wall, it also learns light screen naturally by leveling up, it fills quite nicely in niche of team support. Glaceon will have rough time because of its speed and ice typing isn't best in dealing with current updated gym leader roaster.
My order by usefulness: Sylveon > Espeon > Jolteon=Vaporeon=Umbreon >Flareon=Leofeon > Glaceon
P.S. They all have different niche in a team so the order is relatively speaking, for example if you manage a speed boost-baton pass for Glaceon, it will still succeed as a major special sweeper.