There are some less than obvious combos but it depends on how you're setting your character up. Thieves for example gain a very nice damage boost from their Twist the Knife perk so they can benefit heavily from weapons you wouldn't immediately think of as going with a thief-y type of character. Charmers likewise can make good summoners with their Presence stat so while it might look silly they benefit from the Helm of Heroes if that's how you're setting them up, and so on.
For an archer-type it's not too hard to figure out gear because you need a weapon with the Ranged tag to take advantage of those skills. The early selection of weapons is mainly a set of tradeoffs between slightly more damage, armor penetration or accuracy, but if for some reason you want a shield or offhand weapon you can use the Sling. Later on you'll get some unique options that have various advantages and disadvantages and later still you can buy the scroll-type weapons from the Kitsune Den which are also considered Ranged. Those do magical/mental damage with elemental effects and while they're more meant for a spellcaster due to also being Catalysts they'll work for an archer too, if you're just thinking in gameplay terms and don't care for the mental RP aspect of being an actual archer.
Just for reference, I play a White Mage with an archery skillset for funsies and it works quite well despite not being optimized for either of those roles, so there's a lot of flexibility and you don't have to stress too much about having an ideal setup unless you really want to.