Top or T-shirt advice

[Diplidocus4]

After help with tops - loooking for advice for tops or T-shirts
size 18
no slogans
not fitted
type of thing to wear over jeans or trousers ?
preferably with sleeves or short sleeves

any brand advice ?
just something a little bit “more” than a plain tshirt ?

Seasalt

Uniqlo have great basics like this.

Thank you both

Rapanui gets recommendations on here.
M&S t-shirts can be a bit clingy for me.
Lands' End is good.