Just a file for ideas of entities to kill.

kill @e[type=ulkd_ess:waypoint] -- this will probably not work
kill @e[type=better_on_bedrock:player_corpse] -- this will probably not work
kill @e[type=zombie_villager]
kill @e[type=boat]
kill @e[type=chest_boat]
kill @e[type=minecart]
kill @e[type=chest_minecart]
kill @e[type=furnace_minecart]
kill @e[type=hopper_minecart]
kill @e[type=tnt_minecart]
kill @e[type=command_block_minecart]
kill @e[type=zombie]
kill @e[type=zombie_villager]
kill @e[type=skeleton]
kill @e[type=creeper]
kill @e[type=spider]
kill @e[type=cave_spider]
kill @e[type=pillager]
kill @e[type=silverfish]
kill @e[type=enderman]
kill @e[type=slime]
kill @e[type=witch]
kill @e[type=drowned]
kill @e[type=husk]
kill @e[type=stray]
kill @e[type=wither_skeleton]
kill @e[type=arrow]
kill @e[type=xp_orb]
kill @e[type=item]
kill @e[type=cow]
kill @e[type=sheep]
kill @e[type=chicken]
kill @e[type=pig]
kill @e[type=villager]  -- be careful!
kill @e[type=cod]
kill @e[type=salmon]
kill @e[type=tropicalfish]
kill @e[type=pufferfish]
kill @e[type=iron_golem]
kill @e[type=snow_golem]
kill @e[type=bat]