Is Cassani allowed to enter Denmark nowadays?
Passo san Pellegrino is also totally fine, you have a section of 2.5kms at over 11% and you can have Passo Valles from the western side right before it (4kms at 9% near the top).
Passo Sella from Val Gardena is also underrated.
Put enough other climbs before it and have a downhill finish in Canazei, or in Arabba after the Pordoi and things will happen here.
Passo delle Erbe/Würzjoch has a few really underrated sides, not just the classic tempogrinder from Brixen that would be great in a MTT.