Clube & Napier
They have promoted what became known as ‘Coherent Catastrophism’, which envisions encounters between our Earth and large comets, events that are recorded in ancient history and mythology. They claim, for example, that the biblical Exodus story contains an early reference to Halley’s Comet! Among other encounters, they date the story of Phaëton, mentioned by Plato, to 1369 BC and also discuss catastrophic close encounters with Encke’s Comet or a proto-Encke.
Although Clube & Napier do not refer to Atlantis, from time to time, some commentators have claimed some connection between the demise of Atlantis and encounters with comets named and unnamed.
Philip R. “Pib” Burns has an excellent overview(a) of Clube and Napier’s work on his excellent website.