In Swedish there is a word "präktig" that can be used to describe a person that is annoyingly decent, reliable and good in every way. The common translation is "splendid" but that doesn't sound derogatory at all. "Pompous" is the closest I've come, but that is a character flaw and doesn't really fit. So is there an English word that can be used to describe a perfect person that also indicates that he/she is too perfect?