How is the hunt for Dracula similar to Luke, Obi-Wan, and the others' last stand against the Empire?

Can you find any similarity between the two? Luke, Obi-Wan, and the others' last stand against the Empire and the hunt for Dracula led by Dr. Van Helsing? How are Obi-Wan and Luke similar to Van Helsing and Jonathan Harker? How are Darth Vader and the Count alike? Just something random that popped into my head. No connection with schoolwork whatsoever. So don't worry. This is not homework help. Just some random thought floating around in my head.