I personally would focus on coal, they are the dirtiest, and produce the most carbon per kwhr. Get coal to zero or near zero, it would have broad benefits. But coal is baseline power, that steady producer you need all the time, and the best thing to replace it is nuclear. Wind and solar are intermittent, and batteries won't save that for a long time.
So, then you supplement with NG peaker plants, turbines. And perhaps with EVs in a decade or so we could show some modest progress at reducing normal pollution and some CO2.