I've seen up to 154 hero base and since i'm a free player I myself have up to 148 base all of these have two strengths if the wheel ever stops giving me what I myself can produce I'll be able at some point to find out the skinny and focus the attribute points but til then I'll just keep collecting 145 or above. Last time i looked the inn was holding some as low as 66 underlying and nothing I wanted. Once when I had my feasting hall full and had some thick bunch of heroes there! Like the good ones just hang out at the inn and don't bother to hire out in cities with space!