Rainbow Six 3 and Black Arrow are good games but pale in comparison to Raven Shield.
Rainbow Six: Vegas is good on it’s own merits but does not represent what the series is known for. It’s a cover based shooter with lite tactical mechanics. No real thinking required.
SWAT 3 is right up there with the best tactical shooters, even to this day. It has some of the greatest AI in video games and can be a truly immersive experience.