ok since this is for medium wave dxing ill start.
i listen to a bunch of am staions all over the US and Canada
lets start from the bottom on 560 you have wgam in augusta maine.
on 580 am you have wtag in worcester mass. i talked with thier chief engineer dan kelleher he put in a new ground wave system of 120,000 ft of #10 copper wire. they now reach all the way to ok. on 5000 watts
you also have cfra in ototwa with 50k you have wsb on 650 from atlanta ga. 50k wfan on 660 new york wrko on 680 boston 700 wlw cinci
and so much more ill look at my logs and post more of them to you most of these are 10k or better so when a small fry pops in its fun to listen to them.