I'll do a U2 only list (also, OP, I love your inclusion of Disconnected By Keane; great song by an underrated band):

A - Another Time Another Place

B - Bullet the Blue Sky

C - The Crystal Ballroom

D - A Day Without Me

E - Elevation

F - The Fly

G - Gloria

H - Heartland

I - I Still Haven't Found What I'm Looking For

J - Jesus Christ

K - Kite

L - Lemon

M - MLK

N - New Year's Day

O - Out of Control

P - Pride (in the Name of Love)

Q - Discothe(Q)ue - they don't have a song that begins with 'Q' so this will have to do.

R - Raised by Wolves

S - A Sort of Homecoming

T - Two Hearts Beat As One

U - The Unforgettable Fire

V - Vertigo

W - Where the Streets Have No Name

X - Xanax and Wine

Y - Yahweh

Z - Zooropa