One of the reasons why I think the broken wolf is Lan and not another warder whos aes sedai has dead is the next part of the prophecy,

And his destruction shall bring fear and sorrow to the hearts of men, and shall shake their very will itself.

Lan is a symbol and the carrier of a fallen nation which defended all benath the borderlands and his fall would be the final fall of the land he repersents and would weaken the resolve of men.

I think that the fallen blacksmiths pride refers directly to Perins pride in being a simple blacksmith in TOM he realized that he was wrong and could no longer hold to that pride.

The Broken Wolf, the one whom Death has known, shall fall and be consumed by the Midnight Towers, i think this is Lan he has know death directly though the bond when Moiraine "died" by falling though the portal to Aelfinn land and the Towers of Midknight probably do belong to the Forsaken and Lan is at Tarwins Gap when his POV in the epilogue ends and one of the Forsaken is the general for the shadow and their horde of trollocs that are surgeong towards the Gap