A more modern example, the fight between Iron Fist and Elektra in the short-lived Defenders book by Bendis, while maybe not the important fight in Marvel history, is beautifully drawn by David Marquez. The whole fight is fantastic, here a few panels:
One of the most visually stunning fights I've ever read in a comic. I have the first image as the background on my phone. It's also the only time I've liked her Netflix/Strider Hiryu look!