Storm Drain on Cradily - which got a great boost in G5.
Exeggutor on Eggsy - which is actually disappointing, BUT I hear there are some neat tricks you can do w/ it.
Prankster on Murkrow is stupid good (although if the evolite set is really so good, you'd think we'd see some more cottonee evolite sets out there...).
Honchkrow gets moxie. Which is sick on a physical set.
I'm giving you Eggecute, Murkrow, Lileep to breed with. Oddly Murkrow is supposed to have an Evolite set (for those not wanting to run chansey) which is worth trying out, and then I'm sure there's some use for DW Honchrow. The other 2 are supposed to have mildly good DW abilities and no one's done up a flawless one I've seen yet!
Also, DW Dratini (which you said you have) w/ egg move Extreme Speed is supposed to be real good, and I haven't seen a flawless one yet.
By the way, DW Dratini w/ egg move Extreme Speed is something that's slowly making it's way out there, but I haven't seen any w/ flawless stats that are readily available. Since you already have Dratini, I'd suggest working on that. And if it turns out to be shiny, you will be HOUNDED for trades for it!