“On the Beach” isn’t by a Russian.
Nevil Shute has more in common with Ayn Rand than he does with either Boris Pasternak or Nabokov. He left the UK after the war as he saw it becoming too socialist and went to Australia. Also, he started out as an aero engineer. But I suppose that he didn't fit in with author's theme of Russian authors and their influence. Although including Lolita in that trilogy is a stretch.