As a fan of web novels, I can't give a specific constellation recommendation because every CEO has a different character setting. You need to choose the appropriate constellation according to the plot and character setting of the novel. However, in general, the domineering CEO character usually needed to be strong, confident, calm, decision-making ability, and executive ability. Therefore, you could consider choosing Aries, Leo, Scorpio, and other astrological signs. However, the final choice would depend on the plot and character settings of the novel.