Also location (unless the good recruiters are national operations).

I'm based in Atlanta. Check the websites to see other offices that the recruiters have. Also, I'm listing companies. Recruiters come and go but all of the recruiters at a company usual share jobs.

I've met recruiters from all of these companies either for lunch, at their office or at least over video chat.

I also wouldn't trust national recruiters. A good recruiter forms relationships with the company. The one that I went through for my current position is always meeting the hiring managers for lunch, giving us swag etc.

https://prestigestaffing.jobs.net/

http://www.hays.com/index.htm

http://www.chaseprofessionals.com/

http://www.htrjobs.com/

https://www.matrixres.com/

http://www.elev8staffing.com/

http://www.jdc-group.com/