Our daughter didn't fuss with her ears either. It was a complete surprise to us. I still remember that earaches suck -- I'd describe it as feeling like you've got hot lead deep in your head. Awful.
Also, you've given him teething tablets, but is he cutting teeth? That was the other thing that usually had our girls up nights crying. We used teething rings that we kept in the freezer, etc., with occasional Ambesol (or whatever the child-approved topical oral anesthetic was). Aching gums can also lead to a reluctance to have food in the mouth, etc.
So what do you do for ear infection? I have no Scotch on hand ;)
My son was a champ at holding it together outside of the house. I don't know if it was the novel stimuli or what, but he was worse at night (apparently laying down hurts) and with us.
The one thing I thought of was "He picked something up at the doc's" So what you have is the primary infection (a cold, whatever) and then the ear infection coming in a few days after the cold. So you get one day or so of recovery then back to the waaaah drawing board. They do make some kind of homeopathic ear drops, but I can't say I ever had much luck with them.
I am curious though, Once my son acted like this and then it suddenly went away and bang, a rash. Yay roseola.