I haven't been a fan very long compared to most of you guys so the only strikers I can compare him to are Liverpool 2007 - now. And with that in mind, Torres is his only competition and I would say Suarez is better.
As for the old boys: Kenny, Fowler, Owen, Aldridge, etc. I never saw them play so I can't say who is better.
I think for Suarez to be considered the greatest ever he needs to win something with us. Score in an FA Cup final or help us knock out some of the big boys in the Champions League.
Also, it seems like for every era Liverpool have a great striker. The 2008/2009 Liverpool were the only ones I saw that had a great striker, a great midfield, and a great defense. It seems like we've always got 2/3 but just can't get the final piece in place.