I would like to nominate WMDE-Leszek to be able to create new Gerrit groups.
Currently at WMDE I am the only person that can do this (that I know of), and I gained the ability while requesting access to create repos in T185594.
Leszek is in a more sensible position to be the person creating & modifying these groups.
I guess the solution for this would again be to add leszek to https://gerrit.wikimedia.org/r/#/admin/groups/119,members unless there is a more appropriate group.