Companies want people who make a difference. Think back over the last twelve months and write a list of the significant things which wouldn't have happened without you. Being in the vicinity of success is not enough. Making it happen is what counts. If you are struggling to put things on the list, look at your current projects and focus on the big ones. Too often people get bogged down in 'busy work' or in projects which only get 80% done. Far better to do three major projects which are complete than five half-baked attempts.
Making a difference is not a function of seniority or experience. It's about focus, innovation and determination. Things which are different have never been done before. They're probably difficult. They might also be outside your job description. But it's what organizations want and need. It'll not only make you valuable, but also provide a foundation to the satisfaction you get from work.