I am confused as to why people downplay the Warden's feats. Compare the 5th blight to the other blights: 1st blight ending in 200 years, 2nd blight ending in 90 years, 3rd blight ending in 15 years, and 4th blight ending in 12 years.
Ending the 5th blight in one year is an extraordinary achievement, considering it was ended by TWO JUNIOR wardens (and a senior warden who perished before taking down the archdemon) with no real grey warden training.
As for not being a good fighter, the Warden's kill count is just as high as Hawke's if not higher. Not only has the Warden killed everything Hawke has killed, he also had to deal with a Fade High Dragon, killed a part of Flemeth, multiple Pride Demons, The Disciples, The Architect, and The Mother.
The Warden is a fearsome fighter in his own right.
Edit: Also take in consideration the Darkspawn DLC. It shows that without the Warden, The blight would not have ended in Ferelden, which makes the Warden ending the 5th blight all the more impressive.