The most puncture resistant tubeless tyres I know of are Pirelli Cinturato Velo (available in various widths from 26C+). They are still reasonably fast too and have fantastic grip in all conditions. I've had good luck with a set of the latest Conti GP5000S TR too (in 30C), but the Pirellis are certainly more durable and puncture resistant. The Contis are a bit quicker and more supple. Both are better than the Giant Gavia, although I didn't think they were too bad either.