More time spent filing and sanding. The bevel should go much higher, preferably all the way to the spine
Thinner steel. A knife like that needs no more than 1/8" steel. Thick blades will cut poorly. 1/4" steel is fine for big camp choppers, but way too thick for any slicing or general cutting blade.
The guard and handle on the second one are both square. They should be more rounded, and slightly narrower on the bottom side...sort of egg shaped.
It looks like the fit and finish of the guard and blade are very poor. There seems to be a big gap. Try and have the joint fit very snugly, and either use low temp silver bearing solder or JB Weld to seal the joint.
While oak is tough, it isn't pretty, and it can be uncomfortable to the hand in use. Try a tighter grained wood, like walnut, or a hard and attractive wood like cocobolo, bocote, zebrawood, etc. All these are fairly inexpensive, don't need stabilizing, and can be brought to a smooth and shiny finish with only hand sanding.