Kobold probably has the best stats since it means you don't need any MoArms in order to cap your swing speed. Unless you are gonna go 2H, then troll is best.
If the shaman has MoA(buff)1 (with yellow DQ) or if you plan on using a 75 DQ charge, and if you plan on getting aug quick 1 (+6 quickness), then kobolds only need 2 points into quickness at start to hit the 250 cap (will be 251 with charge and 248 if shaman has no MOA). And if for some reason you were planning on getting dodger, then you need no points at creation (since dodger requires AQ2, but dodger is wasted on savage imo). Or if the shaman has MOA2 then you don't need any into quick at creation either.
It is interesting to note however, that even a troll can hit the cap (10 quickness at creation, aug quick1, shaman with MOA1) swing speed with only MoArms3, though this costs 20 RSPs (with aug str 3 as pre req). At high RR, the highest DPS savage is likely a troll. I guess the troll starts to out DPS the kobold somewhere around RR6-7