Like I said, I chose thug. Here are the reasons I did not choose the others.
Coinshot's are cool only because they can fly, but thugs can probably jump pretty far/high when flaring. Coinshots can shoot metal to take people out, but a thug could carry a crossbow or even throw something fast enough to kill someone with the strength and speed they have and they are not limited to metal which can be deflected. If anyone has seen Randy Johnson hitting a pigeon while pitching, you'll know what I mean. Lurchers can do pull ups and steal your money, that's about it. A thug can do both of those things.
Soothers/Rioters are pretty cool because they can manipulate people's emotions, but I think this is something that a thug could learn to do without allomancy, but obviously not to the same extent. What made Breeze great was not his allomantic ability, but his ability to read outward expressions.
A smoker is worthless by himself, but helpfull with a team. A seeker can find other allomancers but not if they have a smoker. Vin was the only Allomancer that could pierce a copper cloud. So in a sense, Smoker and Seekers cancel each other out.
Tineye's are cool because they can see, hear and smell real well. The other senses aren't as usefull. A thug could carry a spyglass and a hearing horn, although it would attract a little attention but a smelloscope hasn't been invented yet in their world so give the edge to Tineye.
So, of the base 8 mistings, the thug is the best in my opinion. A thug can learn techniques or carry instruments that would allow him to have similar abilites as the other mistings. The others can pump iron, do a bunch of plyometric training, etc. but they can't learn to take a sword in the gut and still move when all conventional wisdom says they should already be dead.