Gothmog as Pat

[Gordis]

Originally Posted by Legate of Amon Lanc

Higher ranking? No way! He was only some silly second captain in command for one attack. If he was a Man, had he not been from Mordor, he would have lower rank than this "Black Serpent" from Harad, for example - he was a King and Gothmog was second captain. If he was a Man, who knows how long he has been in the service. MoS was there for a very long time (for a Man, resp. Black Númenorean).

You have to be not just "somebody" to be specially appointed second in command to the Witch King!
As for MOS, we know exactly how long he served Sauron - 68 years to be precise.