My problem with Schuyler follows what
Indy said. It's a surname that's been taken over, kr8tvly mispelled
Skyler or
Skylar and mispronounced.
It reminds me of
Michaela, which has been bastardized by
Mikayla, Makaela, etc. Now, I could never see a
Michaela - a pretty name - without thinking of (what I consider) the lowbrow trend. Any strength in the original name has been sapped by all the trendy changes. So, even if you use the Schuyler spelling and pronounce it correctly, I think it will be associated with the trendiness.
If that doesn't bother you and you want to use it, I'd say its best on a boy.
Schuyler and
Lark sound a bit like members of a soap opera family to me, though.