Did you consider 'dump' stats being 'dump' only because you chose them to be? What I mean is, aiming for high CON as a high elf fighter is venerable, but wouldn't aiming for high intelligence be better still? Even as a fighter? You don't need to solve everything by flexing muscles after all. A highly intelligent fighter is far more unique in my book than a try hard consitution-esque pretender of a fighter.
Well, given the fact that multiclass is a very tempting option, as some class combinations will definitely be better than 12 levels in a single class, the intelligent warrior is definitely a viable option.
