MONSTERS, LISTED BY ALIGNMENT

LAWFUL GOOD [Heaven]
Blink dog - r
Brownie - r
Dolphin - u
Bronze Dragon (Draco Gerus Bronzo) - r
Gold Dragon (Draco Orientalus Sino Dux) - vr
Platinum Dragon (Bahamut) - vr
Silver Dragon (Draco Nobilis Argentum) - vr
Dwarf - c
Gnome - r
Halfling - r
Ki-rin - vr
Lammasu - r
Dervish - r
Pilgrim - u
Guardian naga - vr

LAWFUL EVIL (Hell) (Acheron, Gehenna)
Beholder - vr
Asmodeus (Arch-devil) - vr
Baalzebul (Arch-devil) - vr
Barbed (Lesser devil) - u
Bone (Lesser devil) - u
Dispater (Arch-devil) - vr
Erinyes (Lesser devil) - u
Geryon (Arch-devil) - vr
Horned (Malebranche) (Greater devil) - u
Ice (Greater devil) - u
Lemure - c
Pit Fiend (Greater devil) - r
Chromatic Dragon (Tiamat) - vr
Blue Dragon (Draco Electricus) - r
Green Dragon - r
Eye of the Deep - vr
Ghost - vr
Fire giant - u
Goblin - u
Hell Hound - vr
Hobgoblin - u
Imp - vr
Kobold - u
Wererat - u
Manticore - u
Medusa - r
Pilgrim - u
Mind Flayer - r
Mummy - r
Ogre mage (Japanese ogre) - vr
Orc - c
Rakshasa - vr to r

NEUTRAL GOOD +
Cloud giant - r
Nymph - vr  : Neutral (evil)
Aarakocra (Bird-Man) - vr

NEUTRAL [CONCORDANT OPPOSITION]
Aerial servant - vr
Anhkheg - r
Ant, giant - r
Ape, (Gorilla) - vr
Ape, Carnivorous - r
Axe beak - u
Baboon - c
Badger - u
Baluchitherium - r
Barracuda - u
Basilisk - u
Bear, black - c
Bear, brown - u
Bear, cave - u
Beaver, giant - vr
Beetle, giant bombardier - c
Beetle, giant boring - c
Beetle, giant fire - c
Beetle, giant rhinoceros - u
Beetle, giant stag - c
Beetle, giant water - c
Black pudding - u
Boar, wild - c
Giant boar - u
Warthog - c
Brain mole - vr
Buffalo - u
Bulette - n
Bull - n
Anatosaurus (Trachodon) - c
Ankylosaurus - u
Antrodemus (Allosaurus) - u
Apatosaurus (Brontosaurus) - c
Archelon Ischyras - u
Brachiosaurus - u
Camarasaurus - c
Ceratosaurus - u
Cetiosaurus - u
Dinichtys - c
Diplodocus - c
Elasmosaurus - u
Gorgosaurus - u
Iguanadon - c
Lambeosaurus - c
Megalosaurus - u
Monoclonius - c
Mosasaurus - u
Paleoscincus - u
Pentaceratops - c
Plateosaurus - c
Plesiosaurus - c
Pteranodon - c
Stegosaurus - c
Styracosaurus - c
Teratosaurus - u
Triceratops - c
Tyrannosaurus Rex - u
Displacer Beast - vr
War dog - u
Wild dog - c
Doppleganger - vr
Dragonne - vr
Dragon Turtle - vr
Dryad - vr
Eagle, giant - r
Ear seekers - vr
Eel, electric - r
Eel, giant - u
Eel, weed - vr
Efreeti - vr (tend towards lawful evil)
Elemental, air - vr
Elemental, earth - vr
Elemental, fire - vr
Elemental, water - vr
Elephant, (Asiatic) - c
Elephant, African (Loxodont) - c
Eye, floating - r
Flightless bird - c
Frog, giant - u
Killer frog - vr
Poisonous frog - r
Fungi, violet - r
Gar, giant - r
Gas spore - r
Gelatinous cube - u
Stone giant - u
Gnome - r
Goat, giant - r
Clay golem - vr
Flesh golem - vr
Iron golem - vr
Stone golem - vr
Gorgon - r
Gray ooze - r
Green slime - r
Griffon - u
Herd animal - c
Hippogriff - n
Hippopotamus - n
Horse, draft - c
Horse, heavy - u
Horse, light - u
Horse, medium - u
Horse, pony - u
Horse, wild - u
Hydra - u
Hyena - c
Hyena, giant (Hyaenodon) - vr
Invisible stalker - vr
Irish deer - r
Jackal - c
Jaguar - u
Lamprey, normal - u
Lamprey, giant - r
Leech, giant - u
Leopard - u
Leprechaun - u
Lich - vr : Neutral (evil)
Lion - u
Mountain lion - u
Spotted lion - r
Lizard, fire - vr
Lizard, giant - u
Lizard, minotaur - r
Lizard, subterranean - u
Lizard man - r
Locathah - r
Lurker above - u
Wereboar - r
Weretiger - vr
Lynx, giant - r
Mammoth - c
Masher - u
Mastodon - c
Bandit - c
Berserker - r
Buccaneer - u
Caveman - r
Tribesman - r
Nomad - u
Merchant - c
Pilgrim - u
Merman - u
Mimic - r
Brown Mold - vr
Yellow Mold - u
Mule - c
Water naga - u
Neo-otyugh - r
Nixie - r

Ochre jelly - u
Otter, giant - r
Otyugh - u
Owl, giant - r
Owlbear - r

Piercer - u
Pike, giant - r
Pixie - vr
Porcupine, giant - u
Portuguese man-o-war - u
Purple worm - r
 

Ram, giant - r
Ray, manta - u
Ray, pungi - r
Ray, sting - c
Remorhaz - vr
Rhinoceros - c
Rhinoceros, woolly - c
Roc - r
Rot grub - r
Rust monster - u

(Source: Dungeon Hobby Shop Museum)

NEUTRAL (EVIL)
Rat, giant (Sumatran) - c

NEUTRAL (GOOD)
Pseudo-dragon - vr

NEUTRAL EVIL
Cloud giant - r
Larva (E) - c
Lich - vr : Neutral (evil)
Night hag - vr : Neutral (evil)
Nightmare - vr : Neutral (evil)
Giant octopus - r : Neutral (evil)

CHAOTIC GOOD [OLYMPUS]
Djinni - vr
Copper Dragon (Draco Comes Stabuli) - u
Elf - u
Storm giant - r
Hippocampus - r
Pegasus - vr

CHAOTIC GOOD (NEUTRAL) [GLADSHEIM]
Brass Dragon (Draco Impudentus Gallus) - u
Werebear - r
Pilgrim - u

CHAOTIC EVIL
Bugbear - u
Demogorgon (Prince of Demons) - vr
Juiblex (The Faceless Lord) - vr
Manes (Sub-Demon) - r
Orcus (Prince of the Undead) - vr
Succubus - r
Type I (Vrock) - c
Type II (Hezrou) - c
Type III (Glabrezu) - u
Type IV (Nalfeshness, etc.) - u
Type V (Marilith, etc.) - r
Type VI (Balor, etc.) - r
Yeenoghu (Demon Lord of Gnolls) - vr
Black Dragon (Draco Causticus Sputem) - u
Red Dragon (Draco Conflagratio Horribilis) - r
Ettin - vr
Gargoyle - u
Ghast - r
Ghoul - u
Frost giant - r
Hill giant - c
Gnoll - u
Groaning spirit (Banshee) - vr
Harpy - r
Intellect devourer - vr
Ixitxachitl - vr
Jackalwere - r
Lamia - vr
Leucrotta - r
Werewolf - c
Brigand - c
Pirate - u
Pilgrim - u
Minotaur - r
Morkoth - vr
Spirit naga - r
Ogre - c
Peryton - r
Quasit - vr
Roper - r
Achaierai - vr

<Credit where Credit is due: Mary Gygax typed out the original 1977 MONSTER MANUAL, working from Gary's hand-written notes.>