I am no expert at all on this. But I do think you are overthinking this somewhat.
My thought is like this.
The piston rings I would think not making much more heat, modern low tension rings are not "springed" up to the cyl. wall. They are for the most part only under "tension" in the compression cycle.
And stroke, together with bearing size, I would think produce much more heat than anything else, because the piston speed is higher and the piston travels longer.
Since you say you would like a torquey engine, I would think your intake runner length, head size and camshaft choice has a much bigger impact on your engine than anything else.
Oldsmobiles and Buicks are known for their torque, I do not think that is (only) because of the stroke, but because of their wide intakes they got much longer intake runners than other brands. This is just my opinion though, not based on proof and facts. But to me it seems sensible.
All small block Olds` have an 3.385 stroke, they also produce good torque, because of the long intake runners.
And with a not so long stroke it is easier to have a better rod length without putting the pin up to high in the piston, I would think this creates a much smoother running engine, with a more stable piston. That runs smoother and quieter than an long stroke more "stressed" engine.
A lot of people who build stroker BMW engines, to fit the longer stroke they must put in a shorter Rod, that works fine, even though I think it is somewhat going the wrong way, they still make more power, because the engine is still bigger than it was before. There is no replacement for displacement any way how you choose to make it bigger.
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