Bill Clinton easily. Signed great legislation like the crime bill, welfare reform, balanced budget, line-item veto (unfortunately SCOTUS overturned), Religious Freedom Restoration Act, 27th Amendment.
I can't believe nobody has tried to correct this, but the 27th Amendment was not Bill Clinton's doing, it did not have his input, nor did he sign it. In fact, it was automatically approved by the 38th state in 1992, six months before he won election and eight before his Presidency.
I suppose we can't all be Jimmy Carter.
I would rather live Jimmy Carter's life than Clinton's or Obama's.