Just my two cents, but I didn't notice anyone mentioned the Goldberg Tiger Series.
I had the smaller Tiger II ARF and I truly think it tracked straighter as a tail dragger then it did in the tricycle gear setup. And, I tried it both ways.
I suspect the Tiger 60 will be as good, or better. The increase in size usually makes most designs a little more docile. Not always, but.....
I also think that in the conventional (tail dragger) setup either plane will accept slightly larger wheels to help in high grass.

And as an added bonus, the planes are designed to be lighter than some others and fly very well with the specified engines.

Now, having said all that, I did built (not arf) a Sig 4*60 as a taildragger and if flew great!

So, obviously, lots of choices.

good luck

hoops