I'd say Shogun and Tito should both be on the list, but if someone actually voted for Tito that would be insane. Sure, he held the belt for a long time, but he was more-or-less a paper champ. He was hand-picking opponents and ducking Chuck while Chuck was beating way better guys than the middleweights Tito was defending his title against. Chuck was the de facto champ of that division for years before Randy came down and took it from him. I mean, what are Tito's wins in that period? A win over a still-very-green Wanderlei Silva and a bogus decision against Vitor?
Look, Tito's deserves a lot of credit and at the time he felt like that guy for sure. I don't want to say his resume is bad - it's certainly not - but we have the benefit of hindsight now and with that 20/20 vision his resume just doesn't hold up among the very best fighters of that era. Rampage beat Igor, Bustamante, Randleman, and Chuck during that period. All four of them had accomplished far more than Wand had going into the Tito fight, and arguably more than Vitor had even if that hadn't been a bogus decision. And as I said, Shogun belongs on this list as well. As late as he came into it, Shogun's 2005 run is arguably more impressive than Tito's entire career. I agree with you that Tito belongs in the discussion because technically he held the belt for much of the period, but he shouldn't actually be anyone's pick and he certainly doesn't belong on the list ahead of Rampage. Beating elite fighters makes you a great fighter, not holding a belt, and Page was the one doing his work in the ring/cage.