Dude, I haven't seen you for a while! But you need to get the Team Fortress 2 Sound Pack. Because some of your Withers sound REALLY funny! Because I have tried this before. And when I spawned the Valentine's Day Wither, the Pink Wither and the Baby Wither, they sounded hilarious with this sound pack!
I have decided to predict the upcoming mob withers. Here they are:
Special Ability: Summons Skeleton minions. Can control said skeletons. Doesn't attack Spiders nor the upcoming Spider Wither. Can also control Wither Skeletons if he's in The Nether.
First Item: Bone
Second Item: Bow (Maybe)
Special Ability: Summons Spider minions. He can only control his Spider minions at night. Doesn't attack Skeletons, Wither Skeletons nor the upcoming Underpowered Wither. Has a 1% chance to summon a Spider Jockey Minion and a 0.8% chance to spawn a Wither Jockey Minion if he's in The Nether.