In the age of extreme gerrymandering (whether to gain political upper hand or to carve out minority majority districts to artificially approximate the ethnic distribution of the population among elected representatives), *this* is what we need to demand.
(For those who want to give up before we even try because "it'll never happen", I say be realistic, demand the impossible.)
(Also, I think the Single Tranferrable Vote thing is better suited for single official elections and/or determining runoff candidates but fails the mission when it comes to creating proportional representation in a large body of elected officials.)