All of the advice above seems to be on the mark. In my experience, lighting, makeup, the occasional filter (e.g. a yellow-green or even orange to minimize freckles and other marks), and especially format all seem to have a greater effect on skin tones than one’s choice of film.(posted 8111 days ago)That said, with relatively pale subjects, my best results in 35mm -- the creamiest and most appealing skin tones -- have come with Tri-X and Agfa’s APX100, both developed in Xtol. Perhaps there’s something unique about the spectral sensitivity curves of these two films? Delta 100 has also has a nice look, but there does seem to be something special about the two older emulsions. If you need speed, the new Delta 400 is also worth a try; I haven't experimented with it enough to make an authoritative judgement, but a number of knowledgeable posters to this board have praised it highly.
As others have noted, T400CN also works well, and when shot at 100 or even 50 or 32 it will block up enough to make most skin problems disappear, but the look is entirely different and I prefer traditional B&W for most subjects.
Good luck!