Although they're rarely competitive, I think 'spellswords' (variety of names really) are the best. It's basically just a rogue or other lightly armored class with the ability to cast lesser to mid-level magic, often enhancements like flame-wreathed swords and stuff like that. Maybe invisibility or illusions and are included, too.
It's really cool and manages to maintain the novelty for a longer time than a class that's exclusively physical or magical. It's a bit of a jack-of-all-trades, so if the game allows enough freedom you can find ways to defeat a lot of things that would block other classes.
Pretty much my go-to class for anything if it exists.

>>138222
trips of relatable post
when i was a kid playing final fantasy V on the emulator i tried using the magic knight job class a lot because i thought that such a cool class deserved to be strong. eventually got it to the point where i had the flare magic for the sword and would use x-fight on the enemy bastards to kill

Depends on the world. If the possibility of bagging a hot Kitsune wife exists, then Human Fighter it is, boring but close to home and focusing on physical prowess complements her skill in magic.
If this is not an option, then I may as well have fun with it. Comically evil skeleton necromancer aspiring to become a full lich and make the world a very spooky place. My legion of boney boys will be based largely on Dark Souls 1 skeletons. And since it's an isekai there's no one who can call out my obnoxious overuse of tropes, unless you faggots also spawn in the same world.

¥Human
¥Male
¥Warrior

What more could you ever need?

Loli berserker
More damage, more good.