I wrote a paper on the "Diversity" of X-Men about ten years ago. This is the data I collected. While the x-books have always tried to include a very diverse cast, its usually the white ones who become the most popular.
X-Men (by approx. join date): Professor Xavier
Cyclops Jean Grey Iceman Beast Angel Wolverine
Rogue Nightcrawler Colossus Storm Banshee Sunfire
Thunderbird Havok Polaris Shadowcat X-Man Psylocke
Bishop Cable Dazzler Longshot Rachel Forge
Gambit Marrow Maggot Cecilia Reyes Thunderbird2 Slipstream
Lifeguard Sage Northstar Stacy X Darwin
Villans (by approx. apperance):
Magneto Mystique The Blob Pyro Avalanche Quicksilver
ScarletWitch Toad Sabretooth Emma Frost Destiny Sinister
New Mutants (by approx. group):
MultipleMan Karma Moonstar Cannonball Wolfsbane Siryn
Magma Sunspot StrongGuy Magik Rictor Warpath
Husk Skin M Synch Jubilee Shard
Surge Dust Tag Hellion Wallflower Pixie
Anole Elixir Mercury Rockslide X-23 Wither
WindDancer Chamber Layla Miller Armor Namor Juggernaut
Prodigy
Total: 85
Stats for total X-Men, Villans, and new Mutants:
American - white: 43
American - black: 8
Hispanic: 4
Russian: 2
UK: 4
Asian: 9
Australian: 3
Native American: 4
African: 3
Italian: 1
Spanish: 2
South American: 2
Middle-Eastern: 1
German: 1
Straight: 76
Gay: 9
Bi: 1
Male: 48
Female: 37
X-Men or Important Mutants for less than 2 years, in the background for the rest, and ending in Death or Depowerment or Deactivation:
Banshee Sunfire Thunderbird Dazzler Longshot Maggot
Cecilia Reyes Thunderbird2 Slipstream Lifeguard Northstar Changeling
Frenzy LMastermind Mimic Paulie Revanche Sunpyre
Xorn Petra Sway Rictor Pyro Chamber
Destiny Wind Dancer Shard Magik Karma Prodigy
Sunspot Skin Synch Tag Wallflower
Total: 35
Stats for Deceased, Depowered, or Deactivated (within 5 years of their first apperance) X-characters:
American - white: 6
American - black: 5
Hispanic: 4
Russian: 1
UK: 2
Asian: 6
Australian: 3
Native American: 3
African: 1
Italian: 1
Spanish: 1
South American: 2
Straight: 27
Gay: 8
Male: 20
Female: 16
Stats involving the 20 most recognizable mutants – this refers to the characters who are bold in the list of 85, and is chosen based on popularity and exposure in the comics, as well as the 1993 Animated Television Series and the 2000’s trilogy of films, which are known to a wider and more casual population than simply the fans of the titles.
Of the 10 homosexual characters, 1 is from the 20 most recognizable mutants – Mystique, who is bisexual
Of the 11 black or African characters, 2 are from the 20 most recognizable mutants – Storm and Bishop
Of the 20 most recognizable mutants, 13 are male and 7 are female
Magneto and Shadowcat are Jewish, Nightcrawler is Catholic, and Wolverine is Atheist
2 Asians, 1 Canadian, 1 German, 1 Russian, 1 African, 1 African-American, 13 White Americans
1 character has a physical disability – the mentor, Professor Xavier
Out of all 85, 9 don’t have codenames, 8 of them women, and the 9th is the mentor, Professor Xavier