OK, now the full X-Men team:
This is the best I could come up with for an ideal X-Men cast (for a TV show, since that's the best format for it, as if any of these stars would do TV... maybe an HBO series or miniseries?). The only trouble I can see is that Patrick Wilson is much, much younger than Julianne Moore, but still, this lineup in the late 90's would've been fab:
Patrick Stewart as Charles Xavier aka Professor X
Ian McKellen as Eric Lensherr aka Magneto
Hugh Jackman as Logan aka Wolverine
Patrick Wilson as Scott Summers aka Cyclops
Julianne Moore as Jean Grey aka Phoenix
Angela Bassett as Ororo Munroe aka Storm
Alan Cumming as Kurt Wagner aka Nightcrawler
Jude Law as Warren Worthington III aka Angel
Kirsten Dunst as Dazzler
Brad Pitt as Gambit
Angelina Jolie as Rogue
...with special guest appearances by Michelle Pfeiffer as Emma Frost aka the White Queen, and Tom Cruise as Mr. Sinister.
This is my final word on this topic... because I don't think this can be topped. The ULTIMATE X-Men cast.... a dream.