I had previously mentioned my favourite charcoal as natural lump.  My favourite brand right now is Nature’s Own Basques Hardwood Charcoal.  The bags normally contain a nice mixture of large, medium and small lumps of charcoal so I slit the bag open lengthwise and use what I need for the particular job.  This brand produces a nice heat and goes high or low and slow without issue.  I also enjoy the scent and to me it seems to impart a nice smoke flavour.

Nature's Own Basques Hardwood Charcoal

Oddly this is also the only brand of charcoal where I’ve had a foreign object in every bag: mostly it’s a rock but my last bag had a long crumbled wire that resembled a coathanger.