Shimano's Ultegra R8000 crankset with 46/36 chain rings is still the best option for a cyclocross double, but it won't work with the GRX front derailleur. - Cyclocross Magazine - Cyclocross and
Vis de Plateau 4 bras SHIMANO ULTEGRA FC-8000 46-36 - WeRideOnShop
Shimano Ultegra Crankset - Denver Bike Shop | Adventure Cycling