I come up with the following three options to say thank you, but am not satisfied with any of them.
Option 1:
I would like to thank the members of my PhD committee, Prof. A, Prof. B, Prof. C, Prof. D and Dr. E for...
Remark: Repetition of "Prof."
Option 2:
I would like to thank the members of my PhD committee, Professors A, B, C, D and Dr. E for...
Remark: Inconsistency between titles: "Professor" (non abbreviated) vs "Dr." (abbreviated).
Option 3:
I would like to thank the members of my PhD committee, Professors A, B, C, D and Doctor E for...
Remark: "Doctor E" seems unusual to me, as "Dr. E" is somebody who holds a PhD and not a medical doctor.
Does anybody have better suggestions?