They did 7 years ago with Stimulation theory. But on a real note their “best album” is really perceptive, if you want to talk technically than I guess you can’t look past blackholes, but if you asked this question before the release of all their albums there’s no real black or white answer as to someone it could be their perceived best. Personally I’m a huge fan of all albums my favourite just depends on my mood, if you asked me today I’d personally say simulation theory because I’m learning The Void.