In 5e, I’ve had the most fun with divination wizard followed by hexblade warlock. The wizard for portent dice manipulation and the warlock for the darkness/devil’s sight combo and short rest recovery.
Bards. They have such an OP kit if you know what you're doing and your DM believes in "yes and..." Honorable mention for bear-barians (moon druid with one level in barb).
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But I always play some flavor of elf or tiefling
Magus. Sword + Magic, baby 😎
Runner-up is Wizard.
But also warlock bc they're magical sugar babies and they get Eldritch Blast.
Warlocks are so fun and there's so many different flavors