Here is a second poetry readers' advisory aid.
If you enjoy reading Walt Whitman, you might also try ...
Jimmy Santiago Baca
James Dickey (later works)
Albert Goldbarth (Read The Library which is very Whitman-like.)
Donald Hall (after 1978)
I relied heavily on the comments in The Facts on File Companion to 20th-Century American Poetry, edited by Burt Kimmelman. Many of the poets included in the reference work are said to have been influenced by Whitman, but I put on the list only those whose work is compared in one way or another to that of the great 19th century poet. I lumped all the Beat poets together as the whole movement seems to be indebted to Whitman.