Damselfish are divided into many genuses. Some are a lot more aggressive than others. If we don’t count Chromis, I think there’s somewhat of a consensus that the most peaceful damselfish are some species from the Chrysiptera genus. Some people seem to do OK with Pomacentrus species and the somewhat more obscure Neopomacentrus and the Lezyigdon (?) genus which only has one species, the Fusilier Damsels.
You’d want to steer clear of Dascyllus, anything “-phidodon”, not sure about Stegastes or the other genuses but better play safe than be sorry.
To play it safe, stick with species from Chrysiptera like Azure, Talbot, Springer’s, Rolland’s, Yellowtail, Tracey’s, Tuxedo (research, these look very similar to the striped damsels of the Dascyllus genus, you don’t wanna end up with a Three-Stripe or Four-Stripe) maybe King (Chrysiptera Rex) demoiselles too. If you can find one from the Neopomacentrus genus (Lyretail Damsel-Neopomacentrus bankieri/ azysron) or the Fusilier damsels that can be community-friendly and stay in small groups.
People have done damselfish specific tanks that include the “-phidodon” genuses and even the Dascyllus species but I’m not sure how it’s done.