Disraeli, Burke, Macaulay and Shakespeare would have voted Leave

"In a progressive country change is constant; and the great question is not whether you should resist change which is inevitable, but whether that change should be carried out in deference to the manners, the customs, the laws and the traditions of a people, or whether it should be carried out in deference to abstract principles, and arbitrary and general doctrines." 

Disraeli, who would have campaigned for Leave. So would Burke, Macaulay and Dr. Johnson. Churchill probably would have been Remain. Shakespeare, of course, would have been Leave.