Advanced versions of basic mobs

it would be nice to have more advanced and more dificult version of skeletons, creepers, zombies and spiders such as skeleton knights who have full armor and increased damaged that roam the game in less quantity than regular skeletons and a skeleton king which acts as a boss and is based in his own castle or to expand the dungeons to have more in them.

a miniture creeper that deals less damage when it explodes but is similar to the baby zombie and spawn as multiple as for a large scale version it would be cool if it had more health but instead of blowing up it spawns mini creepers but with reduced health.

Zombies can be be similar to skeletons or for a boss it can be a zombie giant or even as an addition to the abandoned village you could have a zombie guard thats similar to the vindicators 

A new biome could be added that larger quantity of  spiders are spawned in and a king or queen spider can be added that are the large scale spider bosses in that biome