McGraw Davison Stewart is the biggest realtor company in Tulsa... and they have some good realtors. But out of all the realtors I've worked with (and there are a lot, we have 25 rentals), I haven't really found any that made me go "wow".
They're all qualified, but no one really went above and beyond for me. Two of them were willing to do "shady" under the table dealings to make sure the deal went thru and they got their comission.
If you know a good realtor at McGraw, hats off to you. But from what I've seen of their sales team, "Eh" is about all I have to say. Keller Williams is MUCH better.