He mentioned Giroux in his earlier post.
The last five years when the team was really bad? Dadonov. That's probably it - and that was only a 3 year deal.
Prior to that when the team was good they had a few guy who either signed as UFA or re-signed when they were a pending UFA. Gonchar, McArthur, Kovalev, Hasek, Ryan, Redden, Methot to name a few.
It's harder for most Canadian teams to get free agents or to convince players to waive NTCs. Tax is a big reason. Methot said that the contract he signed in Ottawa had him about $1m better off after he got traded to Dallas. Ottawa are never going to be on the Florida, Dallas, LA, New York scale in terms of attracting and keeping free agents. They are definitely selecting from a smaller pool.
The problem is exacerbated right now though because the team has been bad. Ownership and arena dramas don't help either. If Ottawa can sell the team, get a deal in place for a new arena, and finish above .500 I'm sure it will make it look more attractive next July.