MCU villain power class levels

Decided to make a villain counterpart to my hero power class thread. As usual, I'm only including those with decent feats to pull from. I'm also excluding pure schemers and "behind-the-scenes" villains like Pierce, Zola or Zemo... just because there's too many of them (especially when you include AoS) and it makes it difficult to determine just how powerful or not they are since we never see them directly take on any opponent. 

I found this thread harder to make since there are so many side villains, so I'm just sticking to the more memorable ones and will fill out the rest later. The villains also don't have as much feats as the heroes.

As usual, I won't be listing the villains in any particular order within their own class. Simply grouping them together. 

Anyway, here's a rough draft. Let me know your thoughts or if I missed anyone:


Class S:

Thanos w/ full Infinity Gauntlet
(even just multiple stone Thanos)
Dormamu
Ego
Hela (either a low class S or a high class A)



Class A:

Ronan w/ power gem
Thanos (regular to 1 stone)
Graviton
Kurse (either low class A or high class B)
Ultron (final form)



Class B:

Loki w/ mind scepter
Aldrich Kilian 
Malekith (w/ Aether)
Ronan (regular)
Hive
Abomination
Kaecilius (not sure about this one, will need to rewatch Dr. Strange to be sure)



Class C:

Loki (regular)
Iron Monger
Malekith (Regular)
Yellow Jacket
Ghost
Killmonger (nanite suit)
Yon-Rogg (either a low class C or high class D)
Elektra (Black Sky)
Aida
Purple Man (hard to peg this guy. Can go anywhere between Class B to Class D)


Class D:


Whiplash
Red Skull
Winter Soldier
Vulture (I want to put this guy in class E but considering how he handled Spiderman I'm putting him here)
Crossbones
Davos
Diamondback
Bushmaster
Zinara
Alisa Jones



Class E:


Kingpin
Elektra (regular)
Bullseye
Billy Ruso
Rumlow
Pretty much any other Hand ninja or Hydra agent or military specialist