Bass Chords
Bass players rarely strum full chords: low notes close together turn to mud. Pick a root and a chord type to see how bassists play it, spread out and with notes left out, on 4, 5 or 6-string bass, in any tuning.
The forms
Root and 5th, and root, 5th and octave, work for almost any chord. The 10th is the 3rd an octave up, three strings above the root, and says major or minor without mud. Root, 5th and 10th is the whole chord, spread out. Root and 7th, and the root, 7th and 10th triple stop, cover seventh chords. Every form has one note per string, so the notes are plucked together; low on the neck no two notes sit closer than a 5th.