[lairv]

https://cims.nyu.edu/dynamic/news/1441/

This is just the official name of a chair at NYU. I'm not even sure Jacob T. Schwartz is more well known than Yann LeCun

[stephencanon]

Yann is definitely more well-known outside of academia. Inside academia, it's going to depend a lot on your specific background and how old you are.