Hey
What class or subclass fits these stats?
STR:15
INT:13
WIS:15
DEX:13
CON:13
CHR:12
Since you don't mention a race, I assume this is before any Racial bonuses.
If this is a combat-oritented game I would play a Kobold Vengance Paladin/Arcane Trickster Rogue. Put the +2 in Strength, +1 in Charisma, get a ranged cantrip like Chill touch for your fee cantrip and put it on Wisdom. Take 8 levels in Paladin, the rest in Rogue.
Pick up heavy armor master to boost strength to 18. For spells you are going to mostly do sneak attack-smites, but there is value in picking up shield on Rogue and protection from good and evil on Paladin.
Paladin/Rogue is really hard to do typically because it is very MAD, but you have the minimum scores to make it effective.