Hey guys looking to start a vampire and wondering who are some famous vampires or vampire clans to get some ideas from? Also if you had to say who the most powerful vampire is who would it be? Thanks appreciate it

http://uesp.net/wiki/Skyrim:Lord_Harkon

Easily the strongest we have encountered in any TES game. There's also http://uesp.net/wiki/Lore:Opusculus_Lamae_Bal_ta_Mezzamortie whom was the very first Vampire. Her story explains what vampirism is, and it's purpose.

This is also worth a read, I think: http://uesp.net/wiki/Lore:Immortal_Blood

Dracula.

Lol.

Count Hassildor would be pretty famous, he's a pretty popular leader and his people think he's a powerful wizard... though his vampirism is secret only some know.

Well, the Count of Skingrad is the only example of a vampire I can think of who gained power and prestige in spite of his condition.

There's also Jakben, Earl of Imbel. Siridor may also count (he started and led a group of vampire hunters, as a cover for himself being a vampire). Not to forget Sybil Stentor, either.