Forgotten fighters - Which past greats are notably omitted from most top50-100 list?

Which fighter is usually omitted from top50-100 lists, who you believe has every right to be there ahead of the very high amount of modern fighters creeping in there, perhaps undeservedly.

Fighters may be omitted due to a lack of information known about him , his opponents, or sheer ignorance. Who do you think deserves more consideration?

Someone like Kid Chocolate for example, looks terrific on film, has quite a substantial list of accomplishments, a 136-10-6 record, but still gets overlooked in favour of fighters like Pacquiao, who look much less useful on film, and have accomplished a great deal less.