I've somewhat reined myself in when it comes to buying actual paint samples though — only seven of those (so far). After initially debating between several Sherwin Williams colors in the gray family, I decided I'd be doing myself a disservice if I didn't also check out some Benjamin Moore colors. Upon a visit to the paint department in Ace Hardware, it looked like Ben Moore offered a couple promising gray options: Kendall Charcoal and Chelsea Gray.
Once I painted these two samples on the house next to those from the first round, I definitely liked the Kendall Charcoal better than SW Peppercorn (which now appeared more blue-ish and too dark). Kendall was like a happy medium between the Peppercorn and Gauntlet Gray.