Ensure Dracula remains the centerpiece, and the background, while vibrant, shouldn't detract from his presence.
Avoid making the portrayal cartoonish; it should strike a balance between horror and artistry.
While capturing the essence of both Manchess and Hewlett, ensure the fusion feels organic and not forced.
Refrain from overloading the background with too many elements; it should complement, not compete.
Ensure that the lighting captures the eerie essence of Dracula, avoiding overly bright or flat tones.

With this guidance, the resultant portrait should not only evoke the chilling allure of Dracula but also stand as an iconic piece of contemporary art, bridging the gap between classic horror and modern aesthetics.