I found Aunyaphat (Kitty) onlne, at tourhq.com  and I consider myself very fortunate.  She is an excellent guide, always on time, very knowledgeable, and very helpful.

She speaks good English, practices transparent pricing, and took me to see the Palace/Wat Pho/Khon show on a 1/2 day tour, then several days later 3 temples Wat Bowonniwet/Loha Prasat/Suthat, on a second 1/2 day tour.

She is able to do tours outside of Bangkok, so if you are looking further afield, to Ayutthaya, Lopburi, Khao Yai, etc, or lifestyle tours (cycle, cooking, massage)  please fee free to contact her.  I am glad that I did.

Best wishes.  Jennifer from Canada.