Do you think Phil/Ind combo is not available because it be too much or unfair .
Definitely. Wonder spam would be far too effective, especially if you got the Pyramids and used the GE to build another wonder (maybe even the Hanging Gardens, for added GE unfairness!). Cheap forges too...you could be swimming in GEs, and hence soon swimming in wonders, and then swimming in Great People of more or less any type you want! For most victory conditions, this would be far too powerful, and for a cultural victory it'd be plain ridiculous.
Ramesses II is my favourite leader for cultural victory (although I'm not keen on his UU or UB). I'm confident I'm about to win my current game with him culturally, despite not having stone or marble, and even though Saladin has been building wonders every few turns. The map may not have been best suited for cultural victory, but Ind + Spi means you can still manage it. Cheap temples makes such a huge difference as you can build cathedrals easily.
For cultural victory, I'd rate the traits as follows (best to worst) :-
Industrious
Philosophical
Spiritual
Financial
Protective
Creative
Aggressive
Expansive
Charismatic
Imperialistic
Organised
I'd say Organised doesn't give much benefit, since you're unlikely to get a huge empire - you can't afford to mess around with huge armies or masses of Settlers. Philosopical is useful but Industrious is better and you can't have both. Creative is not as good as it sounds - the +2 culture is practically worthless; the main benefit is cheap buildings, but there are better traits.
Obviously, the UB is also a consideration (the UU is less important). This makes Qin a good choice. Zara Yaqob has the best cultural UB but unfortunately also has lousy cultural traits.
It's also worth remembering your opponents. Ramesses and Louis would be among the most annoying rivals to encounter if you're trying for cultural victory, beating you to all the wonders. If you play as one of them, at least that guarantees you won't be playing against him!