For me (from what I recall) :
In terms of strictly DT'ing solely:
Adrianna (DONY) - I think one of the single best I've ever had. Sheesh. She's a tad pricey now so I haven't seen her in a while, but wow when her rates were lower, Christ she was good and I'm sure she still is.
Baylee (Lear) - She was pretty good, I liked her DT. But she was yet another who became too pricey for her own good and I stopped once Jay jacked her rates up.
Sara NYAW - Good but not as great as I was hoping (I enjoyed Adrianna and Baylee more)
Victoria - xoxo/NYCSE/BubbleGirls (Loved her, wondering why it took me so long to see her, extremely good DT, to me anyways)
Daisy - Jewels/Gentlemen's Choice/Indy (Have mercy this woman was one of the greatest DT's ever, I miss her lol)
And there's likely more, the names just escape me at the moment. I have yet to see some of the other supposed great/popular ones like Hara, Lucy (NYAW), Taylor (NYAW), Aimi (XOXO), CherryDD (NYCVIPSpot), Yuri/Isabella, etc.
Just to reiterate I'm talking good DT'ing ability solely, not "great head givers" per se.