Yes, Irish Setters unfortunately lost their brains when they were overbred. I do know some well-bred IS' who are not stupid, but it's something to watch. The driviest, most intense setters are probably field-bred English. Show bred English and Gordons are pretty similar; solid temperaments, get along well with almost anyone, steady workers. Uh, English Pointers can be like that too, and are another breed I could recommend. I don't personally like Weims much. There are good ones, and there are freaky ones. Same with GSPs. (I probably just irritated a bunch of people)
Here's some agility with a Gordon Setter and a Weim, and also a Stafford, to let you compare some of these breeds. BTW, this is her slow Gordon, and that was my slow Stafford.
[YOUTUBE]ygfYOT2WR0U[/YOUTUBE]
My friend with the Gordons usually has 3, always bitches. I went to her trailer when we were going out to dinner after a trial once, and I had Tully with me. The Gordons were in their X-pen yard outside the trailer door, and I walked in with Tully and turned her loose while I went to talk to the humans. The dogs all drifted around calmly, mostly ignoring each other.
If you can walk in with your much smaller dog into other dogs' territory without anyone even looking irritated, those are pretty darn non-DA dogs.