[bumblebeard]

Iowa's redistricting commission is truly non-partisan: no politicians are allowed to participate.

Seems to work fairly well for them just looking at the maps and variety of results:

https://en.wikipedia.org/wiki/Iowa's_congressional_districts

[s73ver]

Everyone's going to be somewhat political. So no politicians is a good rule, but it still would be good to know the political affiliations of the people doing the districting.