Jathedar Harcharan Singh "Mahalon" became Takht Sri Kesgarh Sahib Jathedaar in 1980.
He helped a lot during the difficult times of 78 onwards
There is not much about him on line
I know he helped and protested big in the Nakodar Beadbi of burning of Sri Guru Granth Sahib jees Birs. The full incident can be read here
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shaheed-khalsa.com]
I found this speech he gives at the Dharam Yudh Morcha! If only all a Jathedaar could speak like this.
He states all Gursikhs should be Rehitvaan and do Simran like there's no tomorrow.
Speech Mahalonਵਾਹਿਗੁਰੂਜੀਕਾਖ਼ਾਲਸਾ
ਵਾਹਿਗੁਰੂਜੀਕੀਫ਼ਤਹਿ