AFAIK, there are NGOs that track these records and have their stats and index on who are the most and least corrupt politicians. But one thing is for sure with this, if a country is progressive, there are certainly good law makers and politicians that can be found there. In my country, the Philippines, it's a total disaster. It's like corrupt politicians are everywhere, coming from local positions up to the national position and I wouldn't name names. It's like that the policies they make are only for them and rich folks that they're tied up with. I still believe that there are few honest and real public servants but they're not taking the spot light because each politician here is thinking that a good person is always a candidate that they'll be against with in the future elections.