Is this sentence gramatically right?

There is nothing wrong with the structure, in terms of grammar, and it is not correct that "which" indicates a sentence--i'm not even sure what you mean by that. However, it's rather awkward in that which is usually not used to indicate persons. One would use the indefinite objective pronoun--whom. In which case, the sentence would read: "There is no father or mother figure with whom to identify, to emulate, to provide a role model and guidance."

Finally, i think your solution is the best: "There is no father or mother figure to identify with, to emulate, to provide a role model and guidance." That eliminates the problem altogether.

Either form would do, both are grammatically okay, but I like the Washington Post's best.

Again with the 'usually' but no explanation given. And it most certainly isn't awkward because "which is usually not used to indicate persons", in fact, as McTag has pointed out, it's perfectly natural.



???