Is there a class that can clear dungeon when 5 boxed?

[nodoze]

Hope I will be ok with Druid tank, Priest heals and x3 Mages..

Any Tank and any Healer should work.

For Dungeons I think Paladins are the best Tanks as they have unlimited target AoE Threat AND can reduce the threat of the rest of the party -30% via Blessing of Salvation and save a party member via Blessing of Protection. That being said both Warriors & Druids can also work fine as Tanks with their own pros/cons.

Priest is likely the best overall Healer though others can work as well.