FWIW, I always self-selected myself out of the running. Gavin once asked me What If, and I told him I was not interested in the lead-dev mantle.
Pieter and gmaxwell are the two that come to mind, if Gavin ever goes poof.
But who knows. Sometimes in the Linux kernel, the maintainer winds up being some relative unknown with great skills and knowledge.
I voted for you before reading the comments...as is my nature on these polls. But I forgot that you have a family to watch out for and that would be a negative in my mind for this particular position.
If Gavin exits stage right or some other accident of fate argues for such an event, I would favor finding someone with a long history in the crypto (or other sensitive technology) community who may or may not have anything to do with Bitcoin but has a decades long history of making good decisions which are obviously in favor of the broader user-base.