This is an example of a perfect final boss, please post and discuss other examples.
https://www.youtube.com/watch?v=RO9sheDSReI
https://www.youtube.com/watch?v=N4RUegWPdis
Remember only perfect final bosses are allowed to be posted in this thread.
https://www.youtube.com/watch?v=uW-GBUJP1NI