If you go barbarian, you can rage and then wildshape to be a really tanky bear but you won’t be able to concentrate on any spells while raging Cleric is probably better for a caster druid, and Light Cleric has a great reaction at 1st level to impose disadvantage on an attacker. Ranger has good options for proficiencies and resistances at 1st level. If you go 3 levels into ranger, one of the subclasses can give you an animal companion

Barbarian works well. Rage stays active after you wild shape, so you can be a raging bear.

Monk might also work. I am not sure how the calculations work in BG3. But you could potentially gain a decent amount of AC.

And as with all Spell casters a single level of Wizard gives you access to learn all Wizard spells from scrolls. Spell levels aren't class locked in BG3, so your highest druid spell level is also your highest Wizard spell level even if you stay Wizard 1.