Ratings are not an accurate meassure of how good a player is. I think he is by far the best Spanish NT player, and arguably the best I have seen overall. And as a Rivals Scout of the NT I have seen a lot. But when a player has maxed its training who is best depends on what kind of player you like. There are plenty of players who have maxed their trainings.
(6769986) Gabriele Turbato is at least one of the best in the world. I don't know his exact skills, but for a big on a world class NT, he has great secondaries.
(8173477) Ulf Gornitz also has great secondaries. Also one of the best bigs in the world IMO.
(4752399) His teammate David Tapia is also one of the best bigs in the world, if you ask me.
Last but not least, I found a player on the Polish NT who likewise, has very good secondaries. For the sake of abiding within the forum rules, I cannot link him; he is on the TL. Sylwester Rakus - 12/5/10/14/16/11 17/18/17/8 9/7
Edit: I would ask what Bañales' skills are, but I wouldn't want it to hurt your NT.
I actually have the skills of the three players you said and I have to disagree, they were the best no doubt, but are outdated players, Turbato has crap secondaries, gornitz (my biggest personal dissapointment) is a monster center with just enough 1on1 to make him a power forward, and Tapia is just a monster center, has not trained secondaries at all.
I like players like french Jean-Baptiste Lafleur (9410020), cesk Jeroným Hána (8189609), Marek Liska (10942461) and Radoslav Urbánek (10942075), polish Sylwester Rakus (9656006), from slovensko Miroslav Capela (6897851), montenegro Andelko Kosac (15130538) It is that type of player that I think are the best.
I have seen a couple of monster (over 15) IS guards, tens of very good secondaries PG/SG, I have seen tens of Outstanding PF like the ones mentioned, there are a lot of centers with triple "green" primaries and good secundaries. But I have never ever seen a SF like bañales. He shoots over inside PF and pounds over SF and can defend both, creates his own shot like the best of them and rebounds and passes like nearly no other SF does.