I have Merrell MOAB trail shoes, and another pair of Merrell trail shoes, but I've forgotten the model name
They both fit me well with plenty of room around the toes, yet still give support and grip
Merrell do lightweight boots as well as trail shoes, so you could try those
For years I always wore boots for hiking, but then I tried trail shoes, and was very impressed; now I wear trail shoes most of the time
So if you want lightweight footwear, perhaps you could try trail shoes?