I took a couple of portraits outdoors last month. I took them in the shadow against a house wall. The film I used was Agfa APX 25, shot at 12 Asa. The camera was a Rolleiflex TLR 3,5 Tessar (from 1938). I had a Rolleisoft/Duto 0 and a light green filter. I used Agfas recipe 8, a superb portrait developer with Glycin.(posted 8338 days ago)The results were stunning! Looong tonal scale, and have never seen so good skin tones before.
I guess APX 100 will work great too, at 50 Asa. Other nice films I would use are Efke R 50 and R 25. They were made to be great portrait films from the beginning. They are ortopanchromatic, so you don't need a green filter with them. No filters even indoors using lamps.
This is my version of Agfa 8 film developer:
Glycin, Normal contrast
Warm Water (125 F / 52 C) - 750 ml Sodium sulfite, Anhydrous - 12,5 g Glycin - 2 g Sodium Carbonate 22,5 g Add cold water to make 1000 ml.
Develop films from 5 to 12 minutes at 68 F (20 C)