Rebel fighter lineup really does work great together.

X-Wing for multirole space combat, quite fast and agile while also packing good firepower, proton torpedoes, enough armour and shields to withstand a hit or two (especially in the games where properly managing your shields let's you finish most missions without a scratch)

Y-Wing an older strike bomber equipped with ion cannons, a lot of torpedoes and it used to have a rear gunner, still agile enough not to be an easy target and actually capable of modes dogfight (it actually outmaneuvers TIE bombers)

A-Wing a state of the art space supremacy interceptor, king of dogfights, equipped with concussion missile launchers that were more capable of taking down maneuverable opponents than proton torpedoes.

B-Wing heavier, slower, chonkier Y-wing successor that packed even more firepower. Having a heavier bomber meant that rebels could engage capital ships with fighters more easily. B-Wings could probably take Y-Wing's heavier missions while X-Wings could take the lighter ones