I am, personally, not a fan of throat hit. So, I am not an ideal candidate, for making recommendations. I have also not used MFS nic, so I can't offer a comparison.
With that disclaimer; one of the first nics I bought on line, was from Wizard Labs. It did have more of a noticeable throat hit... though I would not describe it as even remotely extreme (compared to Heartland Vapes, and RTS{now Nicotine Giant}). It was just their basic line... I'm not sure who the manufacturer is/was. They have since (it was at least 3+ years ago) added additional lines and options. But, they may be worth at least trying a sample size.
The other thing, that might be worthy of exploring (at least with nic concentrates that don't have enough TH), for you is; controlled oxidizing. A limited exposure to air (thus aiding oxidation) can intensify the perception of throat hit. Too much, and it can start to bring out the natural flavors... and pepperiness, of the nicotine. So, I imagine there is some line between enough and too much, based entirely on personal preference.
If you choose to explore this methodology; I would strongly encourage doing it with just 5-10mLs of nicotine concentrate at a time. Just enough to mix up a small test batch of a very familiar (to you) recipe, so you can evaluate if this is worth further study.