There are probably a few more references around the 40k galaxy, but I'm not immediately familiar with them.
I thought it could be fun to pick through some other poems & turn them into their own Space Marine Chapters. Mind you, several of these chapters have *nothing* to do with with the poem, but then again neither does "Dark Angel."
Poem: "Ashes of Soldiers" by Walt Whitman
Colors: Light Grey with Dark Grey stripes
Concept: Known for the eerie silence they bring to the battlefield, these Raven Guard successors inherited their founder's tactical acumen and albino skin.
Motto: "Draw close, but speak not"
Poem: "Fast rode the Knight" by Stephen Crane
Colors: Silver with Green
Concept: A chapter from a medieval world, they are dedicated to sudden & devastating assaults, these marines specialize in bike and speeder tactics.
Warcry:"To save my lady!"
Poem: "My Native Land" by Sir Walter Scott
Colors: Black with Gold accents
Concept: A fleet chapter well known for their nihilistic tendencies, they navigate the edges of the Eye of Terror as a constant guard. Fellow chapter the Dawn Hawks have rebuked them for their lack of piety, despite their excellent deeds.
Poem: "Carnal Apple, Woman Filled, Burning Moon" by Pablo Neruda
Colors: White & Crimson halved
Concept: Created to smoke out and punish heresy within imperial communities, this chapter is known for the numerous burnt cities they have left in their wake.
Poem: "Hurt Hawks" by Robinson Jeffers
Colors: Yellow with Navy Blue
Concept: Shielded as much by faith as by armor the Dawn Hawks extoll the Emperor with every action. Stationed near the Eye of Terror they are frequently at odds with their allies the Dead Souls whose dour demeanor is a sharp contrast to their own exultation.