Hypericum, viburnums, justoff the top of my head..also rose hips, little crabapples.

Callicarpa Ameicana and pepperberries also.

Nandina (I like to use the immature berries too, still green or coppery color). Also immature Blueberries of green/pink can be used. Viburnum setigerum has small dangling green, later red berries. Dogwood. Cotoneaster. I just arrange for personal use...not sure how these would do growing for commercial cuts. I've even used the green immature berries of Phytolacca (poke salad)...has great scarlet stem color. Fun to see if anyone recognizes it. josh