We have primarily Henckles knives. DH sharpens them as needed. Sometimes you just have to go with the 'bigger hammer' theory...use a really large knife for large jobs. I tend to like our 8" 'all purpose' knife for most jobs. But we also have a larger, 10" knife that is bulkier as well. Then there are the smaller ones for smaller jobs. In addition to sharp, you need to have the right tool for the right job - just like quilting or any other task.
Good knives are certainly an investment but totally worth it in the long run.