I'm sorry but this is extremely misleading. Jackson did not catch TD passes per se, he intercepted a pass intended for an opponent and returned it for a TD. Big difference. A receiver faces coverage, sometimes double coverage; a cornerback intercepting am opponent's pass does not face any coverage. Instead, they are sometimes presented with an open field return opportunity - which is what happened with Jackson's two pick 6s IIRC, he picked off the passes and ran down the sideline untouched for a TD. I'm not trying to downplay Jackson's INT return TDs just saying they are not "TD catches" as that term is used and understood. The comparison fails.
Also, in making your erroneous "TD catches" argument, you omitted Iowa receivers Noah Fant and TJ Hockenson - two Iowa receivers with 8 TD and 3 TDs, respectively.