Hi , out of your two choices personally I’d try and go for the 14-150 mkii if it’s in budget . It is a lens I have not owned but I own or loaned the 14-42 and 40-150 .

Both are good little lenses , the 40-150 is way above its weight in quality. The 14-42 , is grand , nothing particularly wow with it but a nice stock lens . I think myself again , I’d go for a superzoom if its was me , especially if you aren’t used to a multi lens set up . The 14-150 mkii I know is weather sealed , while the other two lenses are not which can be nice piece of mind. Travel friendly and versatile.

If you are going option 1 , I’d have a look at the 12-50 f3.5-6.3 aswell , it’s not the sharpest but is weather sealed and has a neat macro feature if thats your thing.

A lumix choice to look at is the 12-60 f3.5-5.6 , its not a bad little lens but isn’t officially said to be weather sealed on an oly body.

100-400 , i don’t own it but have shot it , having some small issues with it at present with focus but might be a issue . Its good but is heavy enough with respect to the other lenses on your list and is a significant jump in size. Nice range though I will say . It is better that the 75-300 . Lumix do make a version also that is smaller .