It may be a touch too gadety for you, but the Trek Domane SLR with the optional "Pro Endurance" geometry (available through Project One) in a size 58 hits all your objective criteria. 581 stack, 396 reach, 425mm chainstays, fd mount, conventional stem & bar, clearance for up to 38mm tires.
The more conventional Argon 18 Krypton GF in a medium with the shortest headset top is just short of your minimum reach target (388mm, with a 580mm stack). Other than that, it hits all other objective criteria.
"They're made of latex, not nitroglycerin"
The more conventional Argon 18 Krypton GF in a medium with the shortest headset top is just short of your minimum reach target (388mm, with a 580mm stack). Other than that, it hits all other objective criteria.
"They're made of latex, not nitroglycerin"