Carl Patterson
From Halopedia, the Halo wiki
Admiral Carl Patterson, also going by the nickname of Buster, was a UNSC naval officer, and commander of the UNSC Stalingrad and of Battlegroup Stalingrad. Patterson was a very straightforward Admiral whose direct foreward-assault style cost him his life in the middle of the Battle of Onyx.
His ship was one of eight sent to Onyx to rescue the Spartan-II and Dr. Catherine Halsey. He was supposed to recieve full information on the planet from the prowler Dusk before attacking the planet, but Patterson chose instead to order a foreward attack before the entire planet was scanned. His fleet destroyed the two Covenant destroyers they found- before the other twenty Covenant ships that had been on the other side of the planet showed up. At the cost of four of his eight ships, Patterson was able to escape.
He set up an ambush for the Covenant ships behind the planet's moon using HORNET Mines which suceeded in destroying almost all of the ships. Patterson again ordered a foreward charge to wipe out the rest. Thirty two more Covenant ships emerged from slipspace around his ships in mid-charge, massacring them all and killing Patterson.