StuH or StuG
Actually from 1942 the StuGs were mostly dedicated AT vehicles and the StuH with the 105mm took over the infantry support role (assuming we're talking about the SdKfz 142/1 and 142/2 family). Since the Sherman is a 1942 tank, it's natural to assume a tank killer version, along with a fire support partner with a 105mm. The US prefered their guns (and howitzers) on turrets, so they had the M10, M36, and the 105mm Shermans, all on the M4 chassis.
They were probably right.
Actually from 1942 the StuGs were mostly dedicated AT vehicles and the StuH with the 105mm took over the infantry support role (assuming we're talking about the SdKfz 142/1 and 142/2 family). Since the Sherman is a 1942 tank, it's natural to assume a tank killer version, along with a fire support partner with a 105mm. The US prefered their guns (and howitzers) on turrets, so they had the M10, M36, and the 105mm Shermans, all on the M4 chassis.
They were probably right.