Here are all of the bosses in terraria, in a list in order of strength.
|King slime||2000||40||10||King Slime AI||Forest|
|Eye of Cthulhu||1st stage 2800/2800 2nd stage 1400/2800||1st stage 15 2nd stage 23||1st stage 12 2nd stage 0||Eye of Cthulhu AI||3 gold|
|Eater of Worlds|
|Brain of Cthulhu|
|Wall of Flesh (WOF)|