One of the main engines used in German airframes was the BMW-801. It was powering one of the best fighters to see widespread service in the ww2, the Fw-190. How would a fighter looked like if you were to propose it? The engine power remains the same as it was historically, so does the fan cooled feature, along with the armored oil cooler. Feel free to 'design' a fine fighter around it, in service from second half of 1941.