Recommendations on the best gynae in KKH

Hi would like to check if anyone has any recommendations for a good gynae in KKH. My wife is currently 13th weeks pregnant and is under sub. But we are planning to go pvt and choose a gynae in KKH to follow all the way till the birth. For now am confused on who is better between Dr george Mariamma and Prof John Tee or open to recommendation of other Dr's too.