List of valid entity types for minecraft server version 1.17.

AREA_EFFECT_CLOUD
ARMOR_STAND Mechanical entity with an inventory for placing weapons / armor into.
ARROW An arrow projectile; may get stuck in the ground.
AXOLOTL
BAT
BEE
BLAZE
BOAT A placed boat.
CAT
CAVE_SPIDER
CHICKEN
COD
COW
CREEPER
DOLPHIN
DONKEY
DRAGON_FIREBALL Like FIREBALL but with added effects.
DROPPED_ITEM An item resting on the ground.
DROWNED
EGG A flying chicken egg.
ELDER_GUARDIAN
ENDER_CRYSTAL
ENDER_DRAGON
ENDER_PEARL A flying ender pearl.
ENDER_SIGNAL An ender eye signal.
ENDERMAN
ENDERMITE
EVOKER
EVOKER_FANGS
EXPERIENCE_ORB An experience orb.
FALLING_BLOCK A block that is going to or is about to fall.
FIREBALL A flying large fireball, as thrown by a Ghast for example.
FIREWORK Internal representation of a Firework once it has been launched.
FISHING_HOOK A fishing line and bobber.
FOX
GHAST
GIANT
GLOW_ITEM_FRAME
GLOW_SQUID
GOAT
GUARDIAN
HOGLIN
HORSE
HUSK
ILLUSIONER
IRON_GOLEM
ITEM_FRAME An item frame on a wall.
LEASH_HITCH A leash attached to a fencepost.
LIGHTNING A bolt of lightning.
LLAMA
LLAMA_SPIT
MAGMA_CUBE
MARKER
MINECART
MINECART_CHEST
MINECART_COMMAND
MINECART_FURNACE
MINECART_HOPPER
MINECART_MOB_SPAWNER
MINECART_TNT
MULE
MUSHROOM_COW
OCELOT
PAINTING A painting on a wall.
PANDA
PARROT
PHANTOM
PIG
PIGLIN
PIGLIN_BRUTE
PILLAGER
PLAYER
POLAR_BEAR
PRIMED_TNT Primed TNT that is about to explode.
PUFFERFISH
RABBIT
RAVAGER
SALMON
SHEEP
SHULKER
SHULKER_BULLET Bullet fired by SHULKER.
SILVERFISH
SKELETON
SKELETON_HORSE
SLIME
SMALL_FIREBALL A flying small fireball, such as thrown by a Blaze or player.
SNOWBALL A flying snowball.
SNOWMAN
SPECTRAL_ARROW Like ARROW but causes the PotionEffectType.GLOWING effect on all team members.
SPIDER
SPLASH_POTION A flying splash potion.
SQUID
STRAY
STRIDER
THROWN_EXP_BOTTLE A flying experience bottle.
TRADER_LLAMA
TRIDENT
TROPICAL_FISH
TURTLE
UNKNOWN An unknown entity without an Entity Class
VEX
VILLAGER
VINDICATOR
WANDERING_TRADER
WITCH
WITHER
WITHER_SKELETON
WITHER_SKULL A flying wither skull projectile.
WOLF
ZOGLIN
ZOMBIE
ZOMBIE_HORSE
ZOMBIE_VILLAGER
ZOMBIFIED_PIGLIN