Well, let me see if I can gum up the works . . .
Which is more chaotic, chaotic good, or chaotic evil?
Which is more lawful, lawful evil or lawful good?
The answer is a bit disturbing, as is the core question in this thread.
Consider that evil is about the intentional infliction of harm to others, without remorse, and without cause. We don't mean evil, we mean Evil.
Chaos is about not following any set rule. This does not mean that a chaotic evil creature will always commit an evil act, but it does mean that he will almost always follow the path of least resistance, but cause maximum pain. On occassion, he may commit a good act, but that is the exception, not the rule.
Law is about sticking to the game plan. This does not mean they follow the rules. However, a lawful evil creature will apply the law in the most cruel fashion they can as a general rule.
As for the Hitler reference, here's a good example:
LAWFUL EVIL-NATIONAL SCALE: Communist China--The law is enforced to the point of crushing all freedoms that the state finds inconvenient. Note that this government really wants a strong and vibrant China.
LAWFUL EVIL-INDIVIDUAL SCALE: Darth Vader--A natural tyrant who wants to impose his will on the universe, to bring order to chaos. Note that while willing to kill Luke, he does love his son, and wishes to co-rule with him.
NEUTRAL EVIL-NATIONAL SCALE: North Korea--This regime is only interested in its own power and survival. It will sell arms to rogue nations that want to kill innocents to bankroll its own survival, and will starve out its own populace for the same reason.
NEUTRAL EVIL-INDIVIDUAL SCALE: Sirus Grissom from ConAir. He enjoys hurting people, but only when convenient, or to send a message. He likes to be brutal, and in charge. He likes the evil in him, as sees nothing wrong with it. On the other hand, he has no personal attachments, though he has ethics: "rapists just above pondscum on the evolutionary ladder . . ." Not a nice guy, but he has standards nonetheless.
CHAOTIC EVIL-NATIONAL SCALE: Nazi Germany. Picked on a socially weak group of people to cast blame. Killed and tortured for the sake of own personal joy, with no compuction. Indeed, sought to conquer for the sake of making slaves of other nationalities, while killing off the weaker. Survival of the fittest via torture is chaotic evil to a tee. Though organized and efficient, the drives and goals of the regime were chaotic evil.
CHAOTIC EVIL-INDIVIDUAL SCALE: Ted Bundy may work, but I like Osama bin Laden. He may have a message, but the message is to kill more. Kill, kill, kill. Do this and get rewarded. Evil, through and through, even if he does not see it.
Evil is evil. Lawful evil generally has a deeper pool to draw on, but chaotic evil is more prevalent. Also, neutral evil is just as common. The government is lawful (good, evil, or neutral is a matter of opinion). The Soviet government post-Stalin was more or less Lawful Evil. It lasted a long time, was quite strong, and firmly entrenched.
The mafia is more neutral evil (lawful and neutral tendencies not withstanding). They have no desire to inflict pain on others, but generally do not care if they do.
Your crack dealers are more chaotic evil. Its about them, and f*@& anyone who gets in their way.
Which is more evil? Which causes more pain? I would argue their all just about as bad as the other, and just as hard to fight.