Comparing H bonding in H2O, HF, NH3, and CH4

So H2O has the highest boiling point out of these four compounds because it can potentially form 4 H bonds. Why does HF have a higher BP than NH3? Doesn't NH3 form more H bonds than HF? Same goes for CH4. Is it due to the increased EN of fluorine over N and subsequently over C? So that the H bond formed by HF is stronger than NH3's bonds which are stronger than CH4's?