Looking for melodic inspiration? These guys are pretty A-ok.

Iron Maiden
Mozart
Haydn
Bach
Beethoven
Brahms
Verdi
Monti
Monteverdi
Tchaikovsky
Rossini
Bizet
Mussorgsky
Chopin
Liszt
Grieg
Vivaldi
Strauss
Schubert
Schumann
Stravinsky
Ives
Frank Zappa
AC/DC
Aerosmith
Early U2
Bad Company
Radiohead
Muse
The Mars Volta
Metallica
Anthrax
Slayer
Megadeth
Judas Priest
Motorhead
Hammerfall
Symphony X
Dream Theater
Joe Satriani
Helloween
Def Leppard
Pantera
Rhapsody
Sonata Artica
Franz Ferdinand
Guns N' Roses
Primus
Les Claypool's Fling Frog Brigade
Les Claypool's Bucket of Bernie Brains
Buckethead
Danny Elfman
Cannibal Corpse
Carcass
Steve Vai
Eric Johnson
Eric Clapton
Derek and the Dominoes
Cream
Strawberry Alarm Clock
Blind Faith
Michael Jackson
The Jackson Five
The Sex Pistols
The Ramones
The Clash
Early Green Day
The Dead Kennedys
Dropkick Murphies
Flogging Molly
The Misfits (with Danzig)
Reel Big Fish
The Aquabats
The Madness
Buddy Guy
B.B. King
Jimi Hendrix
Led Zeppelin
Muddy Waters
Fats Waller
Howlin' Wolf
Robert Johnson
Leadbelly
Chuck Berry
Willie Dixon
The Who
Jethro Tull
STYX
Kansas
Foreigner
Journey
Boston
Queen
Ben Folds
The Stray Cats
Brian Setzer Orchestra
Lee Rocker
Miles Davis
Louis Armstrong
Duke Ellington
Sarah Vaughn
Stevie Ray Vaughn
Jimmy Vaughn
Robert Randolph
Robert Cray
Crosby Stills and Nash
Crosby Stills Nash and Young
Neil Young
Creedence Clearwater Revival
John Fogerty
John Cougar Mellencamp
Steve Miller
John Coltraine
DJ Encore
Ratt
Poison
Warrant
Whitesnake
White Lion
Van Halen
Alice Cooper
Spinal Tap (w00000!)
Tenacious D
Gwar
Yoko Kanno
Paul Gilbert
Racer X
Liquid Tension Experiment
Force of Evil
Ray Charles
The Trans Siberian Orchestra
Billy Joel
Edgar Winter Group
Edwin Starr
George Clinton and the Parliament Funkadelic
Bootsy Collins
Greg Howe
Red Hot Chili Peppers
Blue Oyster Cult
The Moody Blues
The Beatles
Eddie Boyd
Bo Diddley
Thelonius Monk (take your pick)
Warren Zevon
Eddie Cochran
Elvis
Fleetwood Mac
ZZ Top
The Rolling Stones
The Doors
Wu-Tang
Immortal Technique
Mos Def
Jurassic Five
2 Skinny Jays
David Bowie
Jerry Lee Lewis
Steve Winwood
Bruce Springsteen
James Taylor
Toto
Genesis
Peter Gabriel
The Eagles
Joe Walsh
Don Henley
Tori Amos
Norah Jones
Ani DiFranco
Rush
The Darkness
The Beastie Boys
R.E.M.
The Beach Boys
Johnny Winter
Jedi Mind Tricks
Run DMC
Men at Work
Men Without Hats
Abba
A-ha
Cat Stevens
Tracy Chapman
The Flaming Lips
Pink Floyd
Meat Loaf
Peter Keane
Uli Jon Roth
Alice in Chains
Pearl Jam
Silver Chair
Derek Sherinian
Cake
Tool
Webb Wilder
The Allman Brothers
Edguy
Nanowar
Traffic
Simple Minds
Supertramp
Tears for Fears
Emerson Lake and Palmer
Chicago
Earth Wind and Fire
Golden Earring
Blackfoot
Chet Atkins
Jerry Reid
Shawn Lane
Hank Williams III
38 Special
Brian Adams
Eddie Money
Yes
Devo
KISS
Dio
Iggy Pop
REO Speedwagon
Red Rider
Fishbone
Eddie Hazel
Mr.Bungle
Rob Zombie
White Zombie
Charlie Hunter
Bela Fleck and the Flecktones
Yonder Mountain String Band
The Grateful Dead
Foo Fighters
Uriah Heep
Yngwie Malmsteen
Cacophony
Jason Becker
Macgregor
Scott Joplin
Janis Joplin
Ska-P
Deep Purple
King Crimson
The Meatmen
The Dead Milkmen
The Meat Puppets
Possessed
The Gin Blossoms
The Cars
and many others which I'll type later

Let me know if any of that helps.