Standing development accomplishes TWO things, not just ONE.
Acutance enhancing effects are a by-product: the main accomplishment of standing development, or any other reduced agitation protocol, is enhanced local contrast and shadow density and highlight control.
Rodinal effectively suits both purposes. Additionally, it's signature long straight line, gets the most out of contemporary emulsions without promoting 'blocking', or the low density shoulder that limits subsequent interpretation of negatives.
HC-110 introduces it's signature upswept curve, and in many case is less suited to standing development.
An off-the-shelf choice for higher acutance than Rodinal, in standing development, would be Pyrocat or TFX-2, both available from the Formulary. Paterson's FX-39 would be a superb choice as well.
It is easy, however, to do a test of Rodinal. Working with TMY or TMX would give a very good idea of what is possible. Anchell's comments ( or were they Troop's ? ) were meant to rate the developers in normal development protocols.
Acutol might be a good candidate, but I don't have the experience with it that I do with the others. Choosing between Rodinal, FX2, FX39, or Pyrocat would have to be made with the film and curves you have in mind.
You might get some benefit by searching sandy king's and steve sherman's conversations here.
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