I don't know if it is possible, but there's a way besides a nice screen size to keep things manageable and I have seen this working for larger groups.
What they did was sorting the list after their responsibilities within the groups. That way all melee fighter came first on the list which made it way easier for the clerics to keep track on their health. Of course if someone leaves party and joins it again due to crash the list gets slightly messed up.
But this easy method already helps a lot, in my opinion that is
