Mundo Neandertal leads me to a new research paper that shows that the teeth of the Lagar Velho child, arguably the most clear case of Neanderthal-Sapiens hybridization, in spite of being several thousand years more recent than the last known Neanderthals, had teeth that compare well with those of extant modern humans and, in particular, with young H. sapiens from La Madeleine (LM4).
Ref.: Priscilla Bayle et al. Dental maturational sequence and dental tissue proportions in the early Upper Paleolithic child from Abrigo do Lagar Velho, Portugal. PNAS 2010 (paywall or free access depending on your world region, supplementary material freely accessible in any case).
It is noticeable that more and more the support for the specimen being any type of hybrid seems to vanish. Computer Assisted Paleoanthropology clearly states that a comparative geometric-morphometric analysis of the Lagar Velho cranium clusters this individual with modern human children of age 3 to 4 and does not reveal Neanderthal affinities.
So I understand that is fair to say that at the present stage of research there is not a single specimen that can clearly be described as hybrid of H. sapiens and H. neanderthalensis, which is coincident with the growing genetic evidence against such hybridation.