What about Allen Ginsberg or Lawrence Ferlinghetti? I went through a period in my teens when I would read the hell out of the Beat poets.
The poem that has most struck a personal chord with me and that I still have memorized is Ernest Dowson's
Cynara (Non Sum Qualis Eram Bonae Sub Regno Cynarae).
I have forgot much, Cynara! gone with the wind,
Flung roses, roses riotously with the throng,
Dancing, to put thy pale, lost lilies out of mind;
But I was desolate and sick of an old passion,
Yea, all the time, because the dance was long:
I have been faithful to thee, Cynara! in my fashion.