Notwithstanding innate intonation issues, just versus equal temperament, and a variety of tuning methods, I would like to ask what other guitarists use as their "check chords". That is, what chords do you utilize as a quick tuning test by ear?
I have adopted the E5 and the A5, both in the seventh position with open strings. If you have adopted others, I would welcome your suggestions.
Continuing my own research, I discovered Chris Brooks' helpful comment to an article concerning tuning by harmonics; he recommends tuning by unisons & octaves. The two check chords that I volunteered above do just that. The E5 chord in the seventh position provides four E tones and two B tones. The A5 in the same position provides three A tones and two E tones.
I suppose that I am really looking for suggestions to further cross-reference the B string with other unisons & octaves (*). I will refrain from using any thirds, as they clutter the interference beats. (I realize the tuning will never be perfect across the neck; I am just looking for the best compromise using a standard uncompensated nut, typical frets, and an adjustable bridge.)
(*) I should take a cue from Steve Howe's And You & I introduction.