Only the gray guardians?!?!

[linduarte]

There are other orders of elites, or special groups, similar to the guardians gray in Tedas?

[Estoirtoh]

The are several organizations which house elite warriors, for example the Silent Sisters in Orzammar, a group of Dwarven female warriors (and rogues, I believe) who cut out their tongue as an initiation rite, or the Ash Warriors of Ferelden, who adapted the fighting style of dwarven berserkers and charge into combat with their loyal mabari hounds. Another, maybe elite, organization would be at least the on or other branch of the Chantry (the Seekers jump to my mind). Another organization which may count as elite is the Dwarven Legion of the Dead.

[Guardian of the Peak]

Not to mention that you've also got groups like The Antivan Crows, a group of Antivan (Duh lol) Assassins and often looked at as the best in the country. Then of course you've got the Templars of the Chantry as the pseudo Paladins of the DA universe. They use anti magic abilities and specialize in fighting rogue mages and magic using opponents. There's the Orlesian Bards who are not only performers but trained in the ways of espionage and sometimes assassination.

There are more than just that but that's just the few I can remember off the top of my head. Estoirtoh, you named the few others I could think of too.

[ColdSteel1]

The Blackstone Irregulars and The Orlaisian Chevaliers.