Samuel Taylor Coleridge
C.S. Lewis (analysis of Satan from a Christian point of view)
A.J.A. Waldock (analysis of Satan as fool)
Stanley Fish (reader-response-criticism of PL)
Northtrop Frye ("The Garden Within")
Gordon Teskey (Renaissance critical theory as context)
R.J. Zwi Werblowsky (analysis of Satan as hero and fool)
Roger Shattuck (chapter "Milton in the Garden of Eden" in From Prometheus to Pornography)
Sarah Gilbert and Susan Gubar (chapter on "Milton's Bogey" in The Madwoman in the Attic)
Christine Froula, "When Eve Reads Milton"(questions of canon)
and the response by Edward Pechter, "When Pechter Reads Froula Pretending She's Eve Reading Milton"
Joseph Wittreich, Feminist Milton (explores Milton in the context of past and present feminism)
You can find a selection of classic and modern PL criticism in the Norton Critical Edition of PL.
S. T. Coleridge
T. S. Eliot
were the leading critics of Milton's Paradise Lost.