depends. if for only needed in bare, sparse, open type woods where no knife or tool is really needed to move from one part to another? and for just fun and weekend warrioring....maybe a big knife like a kabar or esee 6 or condor hudson bay type. since i wouldn't need to chop any paths or thick brush or small trees down, etc.
now if needed for use in the swamps where i am or a jungle..........then all i want is a good machete. part knife and part axe, the ultimate survival tool. no big knife will handle what a good machete will in thick woods/swamp/jungle, etc. just ask those who live in the se asian jungles, the s. american jungles and central american jungles what cutting tool they carry.