Some of the better factory triggers I've been around...
-Weatherby Mark V
Ruger #1 Varmint (Yes there are Ruger's with good factory triggers)
Shiloh Sharps Double Set Trigger (Regular around three pounds, set trigger at around 8oz)
-Accu-trigger specifically the Varmint and Target variants...
-CZ 453, 527, 550 Single Set Trigger