Many of the companies have similar knives in different sizes, shapes and weights that would meet your needs. You can choose smaller or larger models depending on your size, how you intend to carry it and the jobs you intend to do. All are solid companies that have a considerable following with military personnel all over the world as well as hunters, fisherman and outdoorsman. Hard to go wrong with any of them.
Falkniven, ESEE, KA-BAR, Becker, Cold Steel, Mora, Buck, Bark River and Gerber.
I will give a for instance within the Becker line. The BK 2 is a small(er) but rather heavy knife, the kind you would want to have if the world fell apart while you were sleeping and you may not get the chance to ever buy another knife. It can and will do anything you ask and keep on ticking. The BK16 and BK17 are in the same overall size range as the BK2 but are lighter and have 2 different shaped blades to choose from. Going larger the BK5 and BK 7 are similar in overall length but are very different in blade shape and weight. The BK9, Kukri Machete and Combat Kukri would be the largest size and designed for much heavier tasks including longer term wood processing, trail clearing and shelter building. As I said, each company offers their version of this size progression so it depends on many of the points already mentioned by others, what are you going to do with it, how big are you, how will you carry it, how much do you want to spend, blade preference, etc. Good luck with your search.