I think that with a trainer along for the ride. reapeat with a trainer. then i would go with the T6 over the tiger moth. a biplane is just not a trainer. the best option really is to get either a "box trainer" or one of the other popular sport planes seeing as LHS is out and tower hobbies etc. will be international order. the only thing i know about the yukon was the week i spent in beaver creek, if that is anything near what you have then even mail order seems like it might be a neat trick.
with a trainer (if he's willing to train you on a low wing sport plane, T6, 4*, goldberg tiger etc.) then i think that you should be able to do it just fine. there will be a lot of people that will tell you that you need a box trainer, my thinking however is that with the right mentor, some one who will spend the time with you, then you can learn to fly any sport plane out there. despite what most think, what makes a good trainer is a stable flyer, good slow to medium speed characteristics, gentle and predictable stall. a flat bottom airfoil is mainly the way that manufacturers achieve the flight characteristics, but it really isn't required. a 4 star has a semi symetrical wing and there are lots of people that say it flies better than their trainer. ground handling is most importand for cars, a plane will take some practice again this is where club trainer comes in to play. a tail dragger does increase the learning curve, but not by so much that with help you cant over come it.
Find that club trainer and talk to him. he is far more likely to understand you plight than most people here will, and may be willing to help you out with what you have. if he says you absolutly must get a box, then i guess thats the answer. I just believe that most of the current batch of sport planes out there fly well enough through out their flight envelope that they could be used as a trainer, again with a trainer on a buddy box.