Back on (the original) topic, as I read through Git documentation, I see how it was built to work with email, and how from early on they thought about these different roles which now we just group into one thing, the "Maintainer".

What I said as "Converger" role was actually first named "Integrator": https://git-scm.com/docs/giteveryday#_integrator_a_id_integrator_a