Matt, from a pure loft perspective, a 19 makes sense.. However, I would say a 20 or maybe even a 21 will work because with hybrids, distance wise should go a lot further than your similar iron in a 21. It will also provide the soft landing and green holding properties that you are looking for.
And because they are shorter in length and hence easier to get better contact than your FW, the on course distance gap between a 21 and your FW may actually not be as great as the lofts would suggest.