speech? probably no
pick pocket? also no
lockpick? possibly
sneak? absolutly
heavy armor? nah, too noisy
light armor? yup
archery? most likely yes
enchanting? probably not
smithing? also probably not
which weapon type? i dunno, safety first? onehand and shield!
alchemy? possibly
magic? possibility but which type? restoration comes to mind immediatly. alteration has great defense/utility
companions? so long as they dont get aggro happy and avoid stealthing probably, buddy system
so my thoughts on a dungeon adventurer would be a 1h and shield/archery user in light armor utilizing sneaking. using alchemy and restoration for better self reliance.