( I’ve moved this to projects so you can get individualized responses based on your specific set up. 
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Sounds like a very cool project!
The short answer is sure, lots of people do exactly that. Any switch that SmartThings recognizes which doesn’t actually control the current load to the smart bulbs can be used. It could be mains powered, battery powered, or a “smart switch cover” which is a battery powered device which fits over an existing switch.
You would need both the hue bridge and the SmartThings hub to make this work.