A Jamie saves Westeros in Rebellion fic

Does anyone know of a fic with this premise?

During the Sack of King's Landing, Jaime discovers Aerys' wildfire plot and kills the Mad King. Before he can explain, the remaining Kingsguard, Gold Cloaks, and loyalists believe he's betrayed his vows. Alone, Jaime fights everyone trying to carry out Aerys' last command, ultimately killing over a hundred men—including Gregor Clegane and Amory Lorch—and saving Lyanna (prisoner in Kings Landing instead), Elia, and her children.

Ned and Tywin arrive to find a dying Jaime still using his sword to hold himself upright before the Iron Throne, asking only if everyone is safe.

Basically, Jaime becomes Westeros' equivalent of Dunk at Summerhall, but on a far larger scale? And how would this şape future events of canon?