Some good poems about death that are appropriate for a funeral include "One Art" by Elizabeth Bishop, "Mother's Loss" by Ella Wheeler Wilcox, "O Captain! My Captain!" by Walt Whitman and "Loss And Gain" by Ralph Waldo Emerson. These poems can be used for a "Rest In Peace" theme.
Poems dealing with the Rest In Peace theme are commonly known as death or funeral poems. These poems speak of the delicate nature of losing a loved one. There are numerous online resources that provide well-known poems about death and some that are written by unknown persons. These poems can range from the loss of a close friend to the loss of a child.