Does Bitcoin Cash not count for some reason? Because the original chain is more popular and the fork is smaller?
ETC forked because the main project made a change some people disagreed with. They forked because ethereum changed too much.
Around blocksize if I remember correctly.
Generally when people are talking about “hard forking” they are referring to the majority making a backwards incompatible change that leaves little activity or economic value on the original chain. Bitcoin never forks like this, because who would coordinate it?
Bitcoin core maintainers tried to fork it and were not successful (See bitcoinXT).
Miners and community leaders tried to fork it and were not successful (see bitcoin cash).
Bitcoin exchanges and businesses tried to fork it and were not successful (see segwit2x).
And many more will come, I imagine a PoS fork will inevitably come and not be successful.