Echo & the Bunnymen are similar to Joy Division, Australia's The Church, or early Cure; probably the most famous Echo song is "The Killing Moon".
They were contemporaries of U2 back in the day and occasional comparisons were drawn; Echo's music was more dark-rock than the neopunk of U2 circa 1980, but Ian McCulloch's voice had a similar timbre to Bono's early style.
Both bands were affected by the suicide of Joy Division's singer -- U2 went on to write A Day Without Me about this, and Bono has been known to sing a few lines from the Joy Division classic "Love Will Tear Us Apart" during With Or Without You.
*chuckle* so yeah, check out Joy Division (and the band they became, New Order) as well.... but if you REALLY want to hear where U2's early influence came from, listen to The Buzzcocks!