Warden

By your powers combined, I am Captain Planet!

Wardens, as their name might imply, are focused on protecting nature and their party. In game terms, they're Primal Defenders - tanks with the ability to take on a Bear's strength, or a Goat's stubbornness. If for whatever reason you don't want to be a Paladin or some other class that's actually cool and distinct from all the other Primal classes, play a Warden.

Stealth-ported into 5th edition as, fittingly, the Oath of the Ancients paladin, then, later, as a proposed ranger archetype, the Primeval Guardian, who can turn into a massive-but-slow tree creature that gains bonus reach and temporary hitpoints, later generating an aura that slows down enemies and heals allies.

Disagreement

I would claim that the Earthstrength (Str/Con) build for a Warden is moderately different from Fighters, Paladins, and all the other Defenders, because they get a hell of a lot of AOE attacks. Hit something with your hammer, and it asplodes, making lightning everywhere. Classes other than Warden can't really specialise in this. The problem with this build is that they wind up with pretty poor defences, although Wardens do get more HP than any other class, and who needs defence when you have meat?