All those guys were really good, but not great. Kobe is great, an all-time great, but he's in good company, and some of that company is better than him. I was lucky to watch Magic and Bird in their prime, and although I was too young to understand then, I get it now. I didn't realize how good Jordan was until it was obvious. Kobe was great too, but kids these days seem to overrate him and have never even heard of some of the rest.
A guy that used to work with us told us he had a professor at Howard (mid-90s or so) that sat the class down and told them that Oscar averaged a triple-double for an entire season and until they could comprehend that, they weren't allowed to talk basketball in his class.
Kobe was absolutely an all time great. But I think largely due to outside circumstances he has been elevated above his actual standard.
Basketball in the early-mid 00's was generally terrible. The Pistons won the finals with anti-basketball, everything was stagnant and plays were drawn up to get to the 'superstar' (which could be Stephon Marbury ffs) to dribble about for 20 seconds before taking a contested jumper. 2007 changed all that with the 7 seconds or less Suns, which was really the dawn of the current era in a primitive form. Due to this, Kobe was king.
Additionally, the other best players about had some flaw that the media never elevated them to their proper station:
Duncan - too boring (wtf?)
Shaq - didn't care about the regular season
KG - was in Minnesota
Dirk - was in Dallas
Nash - distributor first
These things combined to make Kobe seem like top of the pack - he was the best of the iso guys, was in a major market, had a personality, and eventually dragged the Lakers to some titles once he got some help in the form of Pau.
He really was a special player, I don't want to discount that. But I feel he either would have been much better coming out 10 years later, or he would have just been another great player depending on his attitude. As it is, he's definitely not one of the top players ever. Top 3 shooting guards? Probably at present, yes. Jordan, Kobe, West.