As someone who mained this for over a year with MW stones, it is certainly viable.
Just remember: You are a
Melee character that CAN throw at people, not a thrower who can melee. I say this so that you NEVER EVER get caught in melee-range while holding your throwing weapon. If that happens you WILL die.
Also, I suggest using something other than stones unless you have MW ones. They don't do very much damage, but are fun to throw.
Level 30 (4 420 577 xp)
Strength: 18
Agility: 21
Hit points: 53
Skills to attributes: 8
Ironflesh: 0
Power Strike: 6
Shield: 0
Athletics: 7
Riding: 0
Horse Archery: 0
Power Draw: 0
Power Throw: 6
Weapon Master: 4
One Handed: 1
Two Handed: 95
Polearm: 1
Archery: 1
Crossbow: 1
Throwing: 115
note: at level 31 you get 7 WM to up Throwing and melee wpf.
can be 1h or pole proficiency as well.
I suggest the Fighting axe or Langes Messer in 2h mode.