As any speaker can tell you, the Sun in English is generally neuter. We call it an it rather than a he or a she. Granted, you might have people like J. R. R. Tolkein calling it female, but you also have him talking about magic rings, elves, and wizards. It's fiction.
When English was more German based, the Sun was female. However, the Romans came and so came their linguistic influence. In Latin and Latin-based languages, the word for the Sun takes a male article, not surprising considering that the Greek god of the Sun, Helios, and the Egyptian God of the Sun, Ra, were both male and that Roman culture was so greatly influenced by these cultures. Thus, the gender bending of the Sun came to pass.
Nowadays, and even back four hundred years, you would be hard pressed to find anyone referring to the Sun as anything but an it, though, not unless waxing poetic. If so, I would imagine whatever gender picked would be arbitrary.
Here is a quote from Sir Francis Bacon written in 1605:
"The sun, which passeth through pollutions and itself remains as pure
So, even by the turn from the 16th to the 17th centuries, the Sun had already been neutered.