According to the linked research, for an 80kg person, problematic amount of Marmite from the MSG contents standpoint would firmly sit around 1,4kg daily consumption, in which case you will be also ingesting definitely lethal 140g of salt, and even worse, more than 11 standard size jars of Marmite.
Sadly, there is probably none that can be reliably sources, there is no barrel-aged vinegar based mild hot sauce similar to Tabasco, as everyone was trying to develop their unique extra-hot blend.
There are plenty of good hot sauces imported from Asia (Thai Sriracha, Indonesian Sambal Oelek [for me the best is windmill brand]), many interesting (and hot AF) European bigger brands (I like Polish Roleski, they have nice hot sauce range) and local small-batch craft brands, but sadly no direct Tabasco replacement, as there’s no direct bourbon replacement – there are tens of thousands of interesting flavors across the world, so I can live with that for a while.