You could attempt a Fridel-Crafts on the desired aromatic prior to stilbene formation. As an alternative, you could do palladium couplings. For the stilbene formation, I wouldn't do a Wittig, I would opt for a McMurry coupling. These tend to have a high reaction yield with an additionally high functional group tolerance.
Once you form the stilbene, you can still attempt the Fridel-Crafts, or set it up for a palladium coupling.