Just a thought here...I have been through all of these contortions, and eventually retired my 203 Kodak Ektar and my 12 inch Symmar and standardized on a 10-inch Commercial Ekar for close-in portraits. It works well on my Linhof, which the 12 did not, and the C.E. gave me a bonus it took some time to appreciate. Those Commercial Ektars give modeling that the Symmar and the f7.7 Kodak Anastigmat did not. Yes, a three-dimensional impression. Hard to quantify but now, a few years after making this change, I love it more and more.
I too had a late model f3.5 210 Xenar lens that I used in a university job for years. I thought it would be poor--it was wished on me, not my choice-- but no. It was super sharp at smaller apertures and gave bright contrast differences at every aperture. It made an excellent lens for portraits and I overcame the wider look by using it with a 31/4 x 41/4 back. Portraits, I found, just rarely need the definition of a full 4x5 negative, Mostly these were portraits of scientists for reproduction in scientific magazines and journals. I wasn't making prints in the Karsh tradition! My 2 cents here ( Do you folks say that in the U.K.?)