Out of all of the X-men, you pick Beast and Gambit... what the holy he!! were you thinking??? Also saying that Wolverine is the Best X-men, you are out of your mind. Even when he's suppose to be committed to them he's doing it half heartedly because he is almost every other major Marvel book there is to try and raise sales.
If you actually read comics recently, Wolverine a pathetic sack, trying to actually tell people they should make more moral decisions while having his death squad (go around killing people) he's a hypocrite. Then in his own series it highlights how much of a complete j@ck@$$ he is by displaying how many lives he ruined and ended with him killing his own kids... Somehow you paint him as the best x-men, when the going gets tough for the x-men and mutant kind, he packs up and leaves. You're lack of knowledge on this astonishes me, and if you are aware of it, wow you should stop pretending he's this great character.
Now between the two Gambit and Beast, Beast is essentially and has been background furniture for the x-men for a very long time, even when he has leadership roles at the school he is completely inconsequencial to the plot. His powers was super intelligence with acrobatic ability and strenght when his second mutation kicked in he became more cat like, Sage further moved this along but it just enhanced his physical abilities even further, but it did not make him smarter or more essential to the x-men. When it was time to choose between the x-men and the Avengers he picked the Avengers... yet you say he's the better of the two. Ultimate x-men Beast, or Dark Beast is far more interesting then 616 Beast.
Gambit's history, loyality and interactions with the x-men is much richer than beast by far. From his introduction and relationship with Storm when she was deaged, his thief background, history with sinister tampering with his dna, his power to charm those who don't know he has this ability. His amazing agility and speed, the fact that he can kinetically charge any non-living thing is amazing. What's more amazing about him is that Mr. Sinister actually purposely limited his ability to kinetically charge organic materials. Not to mention the fact that he could be the fourth Summers child due to Sinister, and his relationship with messing with the Summer's genes. Also you have the aspect of Gambit being Death, a title that Wolverine and him shared as one of the four horsemen of Apocalypse, and where he even tried to over throw Magik the ruler of Limbo. His sorted romance with Rogue, was great for the first couple years, you know when Rogue actually had a backbone and a edge. Now she's just a cry baby and should just marry Magneto, breed then fade into the background.
Was Beast one of the original yeah, does that mean he has done a lot for the x-men over the years not really, is he even relevent to them "nope". Dr. Nemesis is much more interesting and far more brillant than Beast. Scott has always been the one most devoted to the x-men even more so than Jean, and if you haven't picked up a x-comic in the last 2 or so years i would suggest you do that. Because he has proven beyond a shadow of a doubt even more so than Charles or Magneto as far as where his loyalities lay, that's with the x-men. He has gone above and beyond to lead and provide for not only the mutant race in protecting them but also the human race before the Avenger ruined everything. Scott is the real winner here.
So of all the people in the X-men you should do this again with either more essential characters in the X-men roster, like Charles, Jean, Storm, Scott,Colossus,Kitty Pride, Rachel Summers, Nightscrawler, Psylock, Rogue, Cable, Bishop,Julibee, and Sage (is the most underrated of all the x-men and I think scarificed much more than most) who have done much more for the x-men than wolverine, gambit, or beast.
But for those people saying Jean, there is a good reason that people don't want her back in comics, and she should really stay dead. Jean is one of the worst, more maladramatic characters in the x-men franchise history. People love Maddie way more than Jean, and was glad when the goblin force kicked the phoenix forces's A$$.