Looking back at my list of stages from 2007,
el-camino-del-norte/topic2829.html I would single out the following places (my info may be out of date, though, so hopefully others will correct me). And, being the wordy person I am, I ignored your request for "one albergue", sorry.
Orio (private albergue run by a pilgrim)
Monastery at Cernautza (my sense was when we were there that the priests are not really "into" the Camino and that the whole meal thing was a hassle for them -- they brought some plates of food to the albergue for us to eat). The albergue was small, adequate, in a beautiful monastery and in a setting with great views.
Guemes as has already been mentioned. There have been many improvements since my visit.
Comillas (very nice municipal albergue in the old jail, I believe)
Tapia - municipal albergue up on the headlands looking down onto the ocean, beautiful.
Baamonde -- nice albergue in old building; great restaurant around the corner.
Miraz -- the CSJ runs this wonderful place -- communal dinner, a great stop.
There are at least two other albergues in monasteries, which some people are really keen on. I stayed in Cobreces last year (albergue in separate building on monastery grounds, beautiful beach about 1 km away); and have also stayed in Sobrado dos Monxes (huge monastery, albergue in questionable state of hygiene).
And if you are considering the Primitivo instead of staying on the Norte, I have some favorites there as well. Buen camino, Laurie