For instance phelgmatics are considerd to value calm... which fits much more closely with ENTJ's.
I'm not sure why you don't see ESTJ's as being melancolic: materialistic, traditional, upright members of society, wanting respect... all sounds pretty ESTJ to me....
I know it is a streach for most people around here but a lot of this info is tied up with anciet astrology writtings and I've sat through numerous lectures on how langauges gets used/morphed and changed to fit coffee table perspective of moder reader... hence my view that Keirsey may be better than it appears. If I cna dig up any good papers on temprements from my old soeicty I'll post it... it fits fairly well.
There is an interesting fit between NF and Idealisim... Choleric are campaigners, for rights, and benefits etc.. reformers if you like... and the hub of idealisim is the campagners... NF's have been given permission to own emotion, which personally speaking I think is bollox, it's a lighter way to look at emotion, they live within emotion rather than chart the depths as such... (but thats more of an astrological perspective)
I thought he came over very INTx in his book.
Sorry I know I waffle into astrology because it's a good frame of reference that uses temprements still and apply it for a purpose.
PS within each temprament, they split out differently: there are triplicities and quadruplcities....so Melancolic would consist of: Taurus (fixed = stubborn/rooted); Virgo (mutable = flexibile); and Capricorn (cardinal = highly active)... as are all the other temprements...
For Plegmatics: (Cancer = Cardinal) (Scorpio = fixed) (Pisces = Mutable)
Scorpio/water is the root of intuition... Scorp fixed = J, Pisces = P