I have some trouble understanding how one can categorize a player while at the same time admitting he does not remember much of him. It's like claiming you don't like France when you've only crossed the German border and stopped in Strasbourg for a night. Or, to use another analogy, if I am introduced to Bill Gates, whatever my first impression of him is, I am not gonna stand there and say : "nah, I don’t think that guy actually is the owner of Microsoft".
Regardless, anyone who has followed the serie A for more than 5 years, i.e. anyone who has been lucky to witness Batistuta's feats before his star started declining in Rome and before he became a circus animal at Inter, will say that he was indeed an awesome player.
Now, defining world class in the case of Batigol is hardly a difficult exercise. In Florence, he quite simply re-wrote history. He became the team's all-time scorer, this with a rate of well over 0,6 goals a game in the 9 seasons he’s spent there. As mentioned before, he holds the enviable serie A record for most consecutive days of scoring (11). In just a few months, he has managed to make the city forget the traumatism that was the departure of that living God called Baggio. The fans even built him a statue in front of Artemio Franchi. Internationally, he has been a main protagonist in all the major tournaments in which he took part (Copa America and WC, except for the last one obviously), and he is the all-time topscorer with Argentina's NT, ahead of a certain Diego Maradona.
In terms of sheer skills, very few attackers shared the same deadly dashing, perfect sense of position and shot accuracy as his, and to my knowledge only defenders such as Branco or Bob Carlos could boast such a powerful strike in his era. In fact, he quite simply reunited all the essential characteristics of a world class goalscorer. And considering that a goalscorer’s job is, well, to score goals, and that only Signori (the three times serie A topscorer with 25 or more goals, to be sure) has been able to rival him in those years, if Batistuta does indeed only correspond to the definition of decency, it is fair to assume that the following are at risk of falling into the category of the "sub-decents" : Montella, Vialli, Vieri, Amoroso, Crespo, Chiesa, Inzaghi, Weah, Boksic (though the latter two probably belong to another category of players)...
PS : Nicole, Van Basten is the God of centre-forwards, plain and simple. Just like Maradona is the God of fantasisti. Let’s only compare what’s comparable, please.