I haven't come across any positive angle cockpit.
I've been riding a VB 168 and a VB GF002 back to back for weeks, if you want a road bike, don't get a gravel bike. It behaves very differently downhill. I don't want to sound like a GCN presenter, but the BB is higher, the geometry is different in several ways (that I barely understand), but it just doesn't feel nice do go downhill fast with my gravel bike on asphalt. Probably mostly because of the higher center of gravity?
An endurance road bike as far as i can tell is essentially just a road bike with a tall head tube so you don't look foolish with a mountain of headset spacers.
So i'd say either an endurance geometry + cockpit, or whatever road frame that fits you + bar & stem combo.