The Best of Simon & Garfunkel provides a fine overview of how much they accomplished. Simon’s prodigious songwriting gifts produced such elegant expressions of yearning as “Homeward Bound,” “The Dangling Conversation” and “America” within a few productive years. Garfunkel distinguished himself with his angelic vocals on such showcases as “Scarborough Fair/Canticle” and the magnificent “Bridge Over Troubled Water.”