punctuation - Comma after the noun of the Oxford comma?

In a sentence like:

Next to apple, pears, and bananas, a lot of other fruit exists.

Is the comma after bananas needed, allowed, or forbidden? And why?

Is the same true for descriptions with verbs:

Next to fruit that smells of sewerage, looks like dung, or tastes
disgusting, a lot of nice fruit in between these extremes exists.

Or is there a neater way of saying this?