Nit: Mike Little was the other cofounder - you might be confusing him with Mark Jaquith, one of the lead developers and largest contributors early in the project.
Also, with regards to contribution count, it’s important to look at “props” which are the credits given for commits. WordPress has a contribution system that predates things like git’s multiple author support, so users are given props via commit messages, and a system tracks this for attributing credit for each release.