From the four melees we currently have in the game, monk or samurai might be your best bets - both have some flashy animations (you could always consider turning them off, though), but both are more about melee rotations than magic.

Speaking from a lore-perspective (which bleeds into the gameplay a little bite): Every job uses aether (aka magic) in some shape or form. So you'll always get some more flashy animations for the jobs than the base classes have. If thats whats bothering you when it comes to magic-use, you're better off limiting the animations for your own character.
If its the mechanics, I think any other melee would be fine (even dragoon, which I didnt mention before because its not traditionally in light armor) - they're mostly about dps-rotation, but all have little sidebits added, of course - like party-buffs, dot-management and so on.

In regards to the light armor: There is always glamour and there are a couple of light armor glamour options that every job can use - so... any job appear to wear light if you want that.