EoC
evil biome bosses
king slime (always found it really hard bc i have massive skill issue)
[never bothered with QB]
skeletron
[DC was added when i had already beaten the game years ago and i'm defo not doing another playthrough]
WoF
[QS has the same problem with DC, it was added in a later update]
Destroyer
Twins
Prime
Plantera
Golem
Lunatic Cultist
Lunar Towers
ML
(due to my aforementioned skill issues i could only beat DF with endgame or atleast near-endgame weapons)
To me EoC is the easiest because of the predictable zigzag pattern it makes when it charges at the player which makes it easy to dodge, and if EoC is in front or behind the player, just jump over or duck under it.
Eye of Cthulhu (this is the best image I could find without bg)
IMAGE DESCRIPTION:
This is the order I fight boss in; King Slime, EoC, EoW/BoC, Queen Bee, Skeletron, Deerclops, Torch God, WoF, Queen Slime, The Destroyer, Skeletron Prime, The Twins, Plantera, Golem, Duke Fishron, EoL, Lunar Cultist, Moon Lord