What is the best lump coal brand?

Ozark Oak for me. Available at a local grocery store, Harps, so I don't even have to stock it at home even in the winter months. I let them keep my excess inventory, ha. It was $4.98 for a 10lb bag last year. Just boght a bag this spring and they went up to $5.27 per 10lb bag. Great value and great price. Made in Yellville, AR so mfg in-state for me.