Are there any scientists who are pagan?
Why are you asking the denizens of this forum? Do you honestly think that any of us know of any scientists who are pagan? There is only one person who seems to know at least one person, and usually more, in any and every conceivable walk of life who might offer an answer, but other than that I would suggest you ask your question to scientists themselves.
At present atheists find pagans acceptable because they are naturalistic but I wonder how pagan naturalism conflicts with atheistic naturalism when it comes to the techniques and profession of science as opposed to pagan techniques.
I would imagine the area of pharmacology and medicine might come into conflict with potions and spells.
This depends upon your definition of a 'potion'. If you are referring to the use of traditional natural medicines from herbs etc there is rarely any kind of conflict as pagan healers, at least those I know personally, and they are hardly more than five or six, will always restrict themselves to well-known remedies and these only after all modern pharmaceuticals have proved ineffective.
If you mean something taught by Professor Snape to Harry and his mates, no, witches do not use that sort of potion. well, no witch that I know does.
Most spells cast in matters medical are for the relief of pain and stress. Regretably the bible does not give the wording of the spells that Jesus used to make the lame walk and the blind see, except one, which involved spitting onto the ground making a paste of the dust and the spit, spreading this paste over the eyes of a blind man, sending him to a lake to wash the mud off thus making him see again. Another case of the bible being bloody useless when it could have been helpful.
And yes, as far as I, as a pagan, am concerned, there is not one iota of difference between the miracles of Christ and the spells of a witch. Both achieve a change in the physical world by the power of the will of the caster with the aquiescence or assistance of a deity.