Chest Workout

I have been doing benches(flat, incline, decline) for chest workouts. but my bench seems to be plateauing so I tried dumbbell press but I can’t really do it too well.

Can I get some suggestion for chest exercises that I can use for main so I can mix this with bench presses.
Thanks

http://www.exrx.net/Lists/ExList/ChestWt.html

plateauing?
How?
Strength?
Size?
Both?