one of main characters is a pure rogue in my last run;
rarely sneak around, great movement and walk in shadows (being invisible) enable him to move in and out of combat hot zone. basic strategy is to move in backstab and move out if needed.
later on, as DEX gets higher, high defense rating makes him hard to be hit.
investing in Tenebrium weapon, he can also use bows when the main battlefield is messy with elemental/ status effects. later, with headstrong talent (20% bonus against frozen, stunned, petrified and knowdown); he can cure blinded, crippled, bleeding by himself...there's no trouble for him to survive in melee or any kind of combat situation.
last and least, he contributes greatly with crowd control skills:)