I play on middle difficulty as its just right imo,
you said you tried a paladin? i made one a few days ago im playing it now, probably my favourite character, try this out, im getting on fine with restoration and alteration
Race:now, this depends on if you want to have loads of mana, or not much (but enough if you work on it) so redguard or breton
birthsign: warrior or the lady
Class: blade or blunt (i chose blade), block, heavy armour, restoration, akteration, armourer, speechcraft,
also if you have KOTN get the crusader relics, if you dont then whatever armour you can get, enchanted with sigl stones ot mages guild, i choose reguard and these are my current stats with all crusader relics, lvl 14.
health-292
mana-84 (but i have lots of strong potions)
fatigue-265
journeyman in all majors apart from armourer and block which are nearly, 75 restoration because of relics.
75 strength, 61 willpower, 90 endurance
:)