D) In terms of Final Fantasy? Absolutely. No competetion. X was the last great Final Fantasy and will be the last great Final Fantasy, ever.
In general? Not even close. Not that, that's a bad thing..just I don't understand how you could think nothing after X was good. Usually people say that started in 2006, when the PS2 ended, but not right when it started.
To give you a sample:
Note: Only mentioning 1-5 games. There are way too many to list. However GameCube, Wii, and 360 have so few, that I can list them all.
GCN (Complete) Tales of Symphonia
PS2: Dragon Quest Vlll Kingdom Hearts 2 Tales of the Abyss Persona 4 Etc.
DS: The World Ends With You Radiant Historia Etc.
FFVll: Crisis Core Etc.
Wii (Complete) The Last Story Xenoblade
360 (Complete) Lost Odyssey Tales of Vesperia Blue Dragon
PS3: Tales of Graces F Valkyria Chronicles etc.
I'm not comparing any of these games to FFX, but in terms of "JRPGs" these are some of the best of the best.