Tyrone - Dyson and Hathaway are both cops. And would be reasonably good examples :)

Maria - She and River Tam and Liz should have the sleepover Liz keeps mentioning. And Hathaway plays guitar and she is always welcome to sing along.

Quill - I am amused by this metal image of Quill and River Tam having a dance off. Him grooving to 80s music and her like.. and here is some swan lake. :P