I'd look at going with a Weaponmaster fighter for a highly skilled dwarven warrior.
The Berserker only really works well with a thrower, especially with Tavern Brawler, or with improvised weapons. Normal weapons incur a stacking debuff with every attack that will make you not want to use Berserk.
For more off the wall ideas you could go with a dual wielding strength based Ranger Knight with heavy armor and two battle axes, or a strength based heavy armor Monk.