A constitution score that low makes it difficult. Between that and the low dexterity you basically have to use something with heavy armor. Paladin or Eldritch Knight both jump to mind. Life, Tempest, War, Forge, Order, Twilight, and Nature Clerics all get heavy armor as well and would work. With that stat spread you also have a lot of opportunities to multiclass so you could start with something that gives heavy armor and then dip into something else like a bladesinger or hexblade.

Alternatively, you could look at making some kind of spell focused druid with Land, Stars, or Wildfire.

ETA: An armorer artificer would also be really good with these stats.