The Liverpool three were Souness, Dalglish and Hansen featuring in three winning finals plus Nicol as a sub in a fourth. Robertson was in one winning final for Liverpool as was Crerand for United.
Looking back through the old lineups of English clubs, the demographic change between Liverpool 1983/84 and United 1998/99 is startling. United had only four Englishmen the same number as Liverpool had Scots though they also had an Irishman, a Welshman and a Trinidadian. After that it just gets worse.