I don't even know why I'm replying and not just letting the necro die.
The night elves? They played around with fel energies, messed up their own forests, mated with demons and messed up felwood. They created out of their own hubris many many portals for demons and corrupted their own lands. Most of their starting areas are them trying to straighten out their mess.
The Highborne did, the highest caste. The ones that are now Naga and Satyr. Felwood was also a result of the war, it was not something they did personally.
Oh yeah, and Illidan Stormrage.
Illidan is a cool guy.
Oh gee, where to start. They are the main baddies of Deadmines
A group of criminals, no longer part of the alliance.
Demon controlled, also no longer part of the alliance.
Those are scourge.
oh... wait! ARTHAS!
I'm going to go ahead and be snarky here and say he was being manipulated by an Orc.
They imprisoned Thrall when he was young (remember the Caverns of Time?) and basically treated orcs as slaves since they appeared on Azeroth.
This was because of two wars in which the Orcs decimated and almost obliterated the Humans and their allies. It was a very taxing war that brought the Alliance to the brink of destruction. The Horde did much, much worse things to the Alliance before that time period. Also, as far as I know only Blackmoor treated them like slaves. Before that they were just treated like animals and prisoners, which isn't exactly an unlogical reaction to an alien force that nearly wiped your people out.
There is also the corruption of Onyxia... who was in ... wait... STORMWIND!
Black Dragons manipulate humans because humans are often the ones with the most political clout.
Oh... and dark iron dwarves.
They never do anything. Though we have seen them in the Alliance city in VoEB, so maybe we'll get to see them do some nefarious things on behalf of the Alliance.
And let's not forget Kil'jaeden and the countless demons that look like Draenei. They were corrupted as well.
Those are the Eredar. Draenei are basically Eredar, however Draenei that are playable, are playable because they fled the corruption of the rest of their Eredar kin.
So all in all, you named a bunch of factions that are no longer, or never were affiliated with the Alliance as it exists in its current form and tried to pin centuries old evils on them as well, evils that were never affiliated with the Alliance. I know some players like to argue from the point that Horde have still yet to pay for the previous wars they engaged in and pin the demon-fueled orcs on the current Horde, but it's not as if Horde has evil guys who actually committed the deeds being argued about - oh wait, the Horde recruited a bunch of Old Horde members - LOL NVM.
No, sorry. The Alliance is sunshine and rainbows in comparison to the Horde.