Golota might beat McCline, but he would also most likely beat up Mavrovic who wasn't a big puncher at all. Mavrovic did well against Lewis, but his resume outside of Lewis loss is awful. McCline beat guys like Briggs, Whitaker, Grant, Boswell, Mavrovic's best win is between B-level cruiserweight Cantatore or Julius Francis for Christ sake
At least i can say Mavrovic didn't lose to any journeymen like McCline did. McCline is also slow and easy to hit. He also has a KO ratio of 58%, so i don't think he's as powerful as people want to let one. Mavrovic didn't beat anyone noteworthy so yes his resume is bad but he was unbeaten so you can't gauge how good he was beyond his skillset and durability.