Watch the Donkey Kong Women online guitar lesson by Matthieu Brandt from Guitar Lab: Triads and Hendrixian Double Stops
Triads can work well as a hook or be used in thick "in your face" - type of improvisations.
In this Rolling Stones - type groove I'm laying down several shapes of triads on top of a pedal A, D and E. I'm playing this one fingstyle, but playing these triads with a pick will also work. You can easily add a second guitar, piano and/or organ without the groove becoming too thick. There is space for everyone as long as you use your ears.