Is the criteria including approach, difficult of climbing, etc. as a whole? Is nooksack tower getting votes because of objective dangers as well? In reality, the approach to nooksack tower is pretty easy in my book. The bushwhack is minimal, in fact it's not really a bushwhack, and the glacier is straight-forward. it's not all that long. it's true the approach is gully is pretty steep, but I'd have to imagine the in terms of overall difficulty something deep in the pickets would be higher on the pain in the ass factor simply due to longer distances, more 'whacking, etc.
BTW, where is swiss peak? It's in the pickets near challanger right? I dont have a becky guide near by and I can't find it on a USGS map.