When CaptainPicard needed a cloaked ship to get to Romulus in 2368 and Gowron didn't respond to Picard's messages, Picard asked Worf to contact somebody else on the Council, and suggested K'Tal specifically. Neither K'Tal nor Gowron responded, but junior adjutantB'iJik did state that Gowron and the High Council were unable to talk to Picard. (TNG: "Unification I")
K'Tal was played by late actor Ben Slack in his appearances in "Redemption" and "Redemption II".
According to K'Tal's back story found in the script for "Redemption": "K'Tal is an older member of the Council. He follows neither Gowron nor the [Duras] sisters. He serves the Empire. A man who has been on the Council longer than anyone else and will probably still be here when the others are all gone."