I know that there's a way to list total user reputation on the Area51 site, but only among people committed to a particular Stack Exchange Network
You can use the list of chat users. (I'm 117th or so*! I feel special.)
There are 25130 Area51 users and 22529 chat users* at the time of posting. Most of these high-rep users you're looking for will have used one or both, I'm sure, since they're obviously dedicated to and informed about the network.
* Some of the chat users are dupes.