Yes, I'm fairly certain it's the 8th Doctor.
According to wiki:
Original to television, Multi-story:(1)Grace Holloway (she appears in several comic stories as well, and I think has brief 'off screen' (well off-page appearances in Vampire Science and Unnatural History, though that may be my memory playing tricks on me)
Narratively ambiguous *1Chang Lee, (and I suppose
*2Cass would count as well?)
Original to prose, Multi-story (2)Bernice Summerfield (she appears in several short trips,
The Dying Days and
Benny's Story)•
(3)Sam Jones •
(4)Fitz Kreiner •
(5)Compassion •
(6)Miranda Dawkins •
(7)Anji Kapoor •
(8)Trix MacMillan •
(9)Bazima
(Perhaps
*3The Brigadier would count as well?, he appears in several short trips,
The Dying Days, Minuet In Hell and The Shadows of Avalon)
Single adventure
(10)Edward Fyne •
(11)Lorenzo Smitt •
(12)Debbie Castle •
(13)Ayfai •
(14)Evelyn Chan
The wiki notes that in
The Gallifrey Chronicles (which I haven't read yet) ''Marnal lists the Eighth Doctor's companions as Lorenzo,
(15)Delilah,
(16)Frank,
(17)Claudia, Deborah (Debiie Castle),
(18)Jemima-Katy, Miranda,
(19)Nina, Anji and Beatrice'' I'd assume Lorenzo Smitt is the one being referred to, and it seems Beatrice is Trix, the other companions are presumably people the Doctor met during his century long exile on Earth.
According to the wiki a character called
*4Larna appears in T
he Gallifrey Chronicles, Unnatural History, and The Infinity Doctors, I can't remember her significance, but I'll take Wolfie's word for it and list her as well.
Original to comics Multi-story (20)Stacy Townsend •
(21)Ssard •
(22)Izzy Sinclair •
(23)Fey Truscott-Sade •
(24)Kroton •
(25)Destrii •
(26)Josie Day
Single adventure (27)Billy Wilkins •
(28)Ray Stobbs •
(29)Ediphis •
(30)Chantir
Original to audio, Multi-story (31)Gemma and
(32)Samson Griffin (whilst they've only made one appearance in an Audio story, Terra Firma had several flashbacks to previous adventures, and they were in a couple prose short trips I think) •
(33)Mary Shelley •
(34)Charley Pollard •
(35)William Shakespeare (he appears in one or two of the prose short trips I think) •
(36)C'rizz •
(37)Lucie Miller •
(38)Tamsin Drew •
(39)Molly O'Sullivan •
(40)Liv Chenka •
(41)Helen Sinclair
Some might argue that
(*5)Alex and
(*6)Susan could also count as companions.
Single adventure (42)Romana II (though she also appears in
Neverland, and the
Shada remake IIRC ends with her and K9 travelling with the Doctor back to Gallifrey not doubt they got lost or distracted along the way) •
(43)K9 Mark II (K9 apparently also appears in
The Gallifrey Chronicles) •
(44)Todd •
(45)Rita (Todd and Rita were mentioned by the Older 8th Doctor in
Mary's Story, (assuming the list of companions he names are chronological, it is possible Todd and Rita were the 8th Doctor's final companions) •
(46)Daphne (the android built by the Doctor in
Prisoner Of The Sun)-It's been ages since I listened to it, but since the Doctor spends 600 years trapped on the planet you could argue the Jellyfish aliens he lived with were also companions, and the wiki lists a
(*7)Selta as one of them
So by my count the 8th Doctor has had either 46, or 53 companions in total so far!
BF currently had a license through to 2025, and Titan Comics could potentially do more 8th DR stories in the future, so we could be looking at a round 60 soon...
(Edited)