'Deal With The Preacher'. I first heard it - and taped it! - when Tommy Vance played it on the Friday Rock Show nearly 40 years ago, and it still sounds like a truly dynamic and original blues rock moment.
There are more famous Bad Company songs of course, like 'Can't Get Enough', 'Feel Like Making Love' and so on. But this is the one that does it for me. That urgent guitar riff, Boz Burrell's bubbling bass, Paul Rodgers at his bluesy best, and towards the end in particular Simon Kirke giving it some serious welly to up the ante - who could ask for anything more?