[ndt]

"I'm not sure how to classify Isaac Newton..."

Any way you like because, religions dogma played no part in his Newtons theories.

"How about Gregor Mendel?"

Wrong again, God and religion play no part in Mendelian genetics.

"How about Kepler?"

Please show me where in the laws of planetary motion God or religion play any part.

You seem to be under the mistaken assumption that a science done by a religious person is science based on religion. In fact, all three of the people you mention notably failed to use religion in any of their successful theories. When the rubber hit the road, they ignored God, and did science.

[syriacus]

You seem to be under the mistaken assumption that a science done by a religious person is science based on religion

You inferred that, incorrectly.

[aruanan]

When the rubber hit the road, they ignored God, and did science.

Ha ha ha ha ha. Thanks again for demonstrating for us the depth of your understanding of both religion and science.