I don't see what you are talking about. I've read the all the codex entries regarding the Chevaliers. I don't think you have at all. There is nothing there that says that the Chevaliers have to commit murder. Period. Also, make up your mind. Is it murder or murdering city elves? See, I saw nothing that stated in the lore outside of one Chevalier (Michel's boss) that says you have to do that.
I see you throwing an entire group under the bus based upon the words of one book. No one can be individuals in your eyes if they apart of this group. Let me break back down the list, and I'll focus on examples of the negative aspects.
Templars--Several examples in the games and the EU of how awful they can be. Mages made tranquil as punishment, and sometimes for folks like Alrik to take advantage of.
Circle Mages, including the various different factions--You've read Asunder, which among many included the dubious act of Adrian framing Rhys for murder. That book pretty much showed all sides of Circle mages, good and bad. Enough said.
The Seekers--Lambert, Cassandra's boss and plenty of others I could dig up.
Chantry brothers and sisters--Blood thirsty easily led mob against the Qunari by Patrice in DA2, among too many other greedy, selfish or murderous members in the EU and games to count.
The Qunari--The Arishok in DA2, the use of Qamek and being made into a mindless drone. The comics got a little dark in parts.
The Wardens--Even prior to this game, you had people like Avernus, and I'm sorry but using blood magic for a couple hundred years is pretty damned brutal, even if it was for good intentions.
Edit: How could I forget Tevinter--The slavers in Origins and then Danarius in DA2.
All of these formal groups have had exceptions to the rule being shown as party members, advisers and/or major NPCs in the games/books/comics. So we're gonna have to agree to disagree.