You could go the Cleave and Great Cleave route with the two-handed weapon tree. As for the one-handed weapon, the only real value to using one would be the use of a shield. For that reason, you should try to look into feats dealing with shields, rather than augmenting the one-handed weapon directly. There are some feats for that right here on the site:

http://www.giantitp.com/articles/tAI...7MFFjrPPQ.html
http://www.giantitp.com/articles/ruI...FBCOi5fK8.html