A good team with a good execution vastly outweigh any good business ideas. However, I cannot seem to find a similarly driven person from my colleagues, ex-colleagues, Uni alumni or family members. They may not necessarily reject the idea, but they are not a good fit as they are content with their current lifestyle and career. I am aware of the common suggestions like networking events, incubator programs, etc. But getting a cofounder on board is like a 'marriage'. To engage someone whom I do not know well, sounds counter-intuitive. What are your thoughts on continuing to find a co-founder, or simply focus on the business? To provide more context, I am a single-person bootstrapped startup with paid freelancers only.
Based on the intellectual way you worded your question, it seems like you already know the answer :-)
Although a team is important, it isn't everything, and if you prove that your venture is doing well/has potential (traction, profits, conversion etc...), you shouldn't have any problems.
Co-founders are like romantic relationship - keep looking (without it being an issue), eventually you'll find the right one.
To improve your chances, try focus on forums/meetups and the various other platforms which focus specifically on your field and/or the startup lifestyle, as this will increase the chances of success.
I've successfully helped over 300 entrepreneurs and would be happy to help you if you need any assistance.