Be brave and put away the reflector, to keep the shadows deep.
Nothing beats black & white for character portraits, whether using natural light, LED lights or flash. Unless you are going for a beauty shot with diffused lighting, try Rembrandt or split lighting for contrast. Be brave and put away the reflector, to keep the shadows deep. In editing, use the highlight and shadow recovery sliders sparingly to keep the contrast high. Adding digital noise for a film-like grain effect can be very effective too. See more black & white portrait guidance here.