Here is a command block command I've been writing for a while for summoning smeagol (lord of the rings) as best as i can in minecraft.
/summon Zombie ~ ~1 ~ {CustomName:"Smeagol",CustomNameVisible:1,ConversionTime:-1,Equipment:[{id:wooden_button,Count:1,tag:{Unbreakable:1,display:{Name:”My preciousssss”},Lore:[“Wear to become”,”addicted, and”,”invisible."]}},{id:leather_boots,Count:1,tag:{Unbreakable:1,display:{color:13416632}}},{id:leather_leggings,Count:1,tag:{Unbreakable:1,display:{color:13416632}}},{id:leather_chestplate,Count:1,tag:{Unbreakable:1,display:{color:13416632}}},{id:leather_helmet,Count:1,tag:{Unbreakable:1,display:{color:13416632}}}],DropChances:[1F,0F,0F,0F,0F],Attributes:[{Name:generic.maxHealth,Base:5},{Name:generic.movementSpeed,Base:0.3},{Name:generic.attackDamage,Base:3},{Name:generic.followRange,Base:40,{Name:generic.knockbackResistance,Base:0}],Invulnerable:1,PersistenceRequired:1,ActiveEffects:[{Id:16,Amplifier:1,Duration:2000000,ShowParticles:0b}]}
:D it's rly long. For all the command nubs, in a singleplayer world with cheats enabled, do /give @p command_block and then paste this command in.