Then the O-1 and H-1B are your only options. While ownership/control is generally not an issue in the O-1 context, it is in the H-1B context so to proceed with

Then the O-1 and H-1B are your only options. While ownership/control is generally not an issue in the O-1 context, it is in the H-1B context so to proceed with an H-1B, you would have to cede ownership/control to your cofounder.