Beartic
can have swift swim so base 100 speed
can learn super power , icicle crash and many more ice moves , can have stone edge , dive
though cant realy take advantage of other wether teams but stone edge can take care of fire in sun and ice moves against sand teams
also
Toxicroak
has hydration can learn ice punch drain punch and many more fight moves also stone edge
capable of killing any non duel type weather pokemon with right moves even rain
works well with leftovers
Elecrtrivire
thunder wont miss also has acseess to ice fight and rock moves also has great speed
counters any electric pokemon the foe has that thinks they can cripple your team
Zapdos
great spatk acess to thunder but not as good movepool as elctrivire but can be a good staller
Armaldo
gets swift swim
has rock moves fighting moves and aqua tail
not the best option but can also work well against sun teams hail teams and can work in rain teams
Thisll be last probs
Jolteon
has great speed and decent spatk can make good use of hp water and thunder
can also batton pass boosts from moves like charge beem or t wave the opponent
though doesnt have very good acsess to the move types you want unless you use hidden power