I've been looking for a good alternative measure to "Spire Measure" where peaks that would seem to have spire-like characteristics end up on the list. For example, with the currently accepted "Spire Measure" involving average slope and relief, Lizard Head misses the list, where El Diente makes it.
Prominence divided by distance to saddle yields some more intuitive results, ranking Curecanti Needle, The Sharkstooth, Peak Fifteen, and Independence Monument in the top ten. Lizard Head makes the top 56. Elbert is last on the list of all 4356 ranked CO peaks.
This is far from a great dataset, however, since the measure doesn't consider how steep it is between the summit and saddle other than from an average perspective. So for example a peak with ten miles of only 100' of rise from saddle to its lower flanks before it rises 1000' up a sheer face would not be recognized as such. This is why Lizard Head isn't in the top 10, as its saddle is a comparatively long way from the base of the summit tower.
To be continued...