I am very fond of my Pfaff 1471 . It is comparatively lightweight for carrying.
I am also fond of the Singer 237 - i think it is an early 1960s model. It has forward and reverse , three needle positions, and zigzag. It can handle heavy weight denim. However, it is quite heavy. It is a plain jane machine, but also easy to operate.
As far S i know, any of the mechanical Berninas whose model number ends with 30 is apt to be a good machine.