Ah. I have to think about that but I get where you are coming from. Your avatar looks to me like: Primal versus Arcane.
The 4e roles felt off to me. A stronger aspect is the correlation between role and target.
• Defender ≈ melee multi target
• Striker ≈ melee single target
• Controller Blaster ≈ range multi target
• Leader Troubleshooter ≈ range single target
So a healer who is a troubleshooter can watchover the entire battlefield, and when seeing an ally dwindle, to a big boost to shore up their health. An archer who is a troubleshooter can help focus fire on the opponent of the embattled ally.
Wizard who is a Blaster can cast a wall to keep away hostiles, but the concept is, the Blaster is targeting and taking out multiple targets at range.
And so on.