Good game Theon. In the face of 4-2-3-1 and 4-3-3s, it took bollocks to stick to the narrow formation, be it the diamond or the Christmas tree, much like your classic 4-4-2 in the Premiership draft. In terms of starting Shevchenko, I think it would've made things a lot closer, albeit the arguments I'd have put forward would've been much the same.
Forced to choose, I'd take Nesta over Ferdinand. But there is not a lot in their top level. As for the rest of the list, it's always hard to judge defensive players from previous eras because we tend to judge them on the number of mistakes they make, and you really need to watch them every week to get a feel for just how solid they are. But for those of the last 25 years, Nesta and Kohler ahead (albeit marginal), Ferdinand a better and truer defender than Sammer, and I love Bergomi but reckon he's a tiny bit below Rio.