Harvard's best graduate, with sword cane? :-)

A lawyer might be interesting, and I won't be sad to see one of the lethal damage-dealing characters go. (It makes me a bit nervous.)

An occultist would also be a good call. The party doesn't have anyone with a Theology/Occultism/Archaeological bent. Dave's got the treasure-hunting going on, but I didn't detect any learning behind it - at least, no more learning than would be necessary to get the loot safely.