If Denethor hadn't committed suicide

[Inziladun]

Originally Posted by PrinceOfTheHalflings

Perhaps Aragorn can heal Denethor's madness.

Possibly, though I think it would have been Aragorn's biggest test since Frodo's knife-wound by the Witch-king.
The question there is whether Denethor would have allowed Aragorn the chance. After all, that would have put Denethor in Aragorn's debt, wouldn't it? And I really doubt that's a position that would have been acceptable to Denethor.