I think doing a good analysis of strategy here will depend on a lot of factors.

Firstly, before coming up with a strategy, it is good to have a clear idea of your goals / the strategic problem you are trying to solve. I see or could infer a few possible ones: you want to work in an environment where you don't feel bullied, you want to ensure others aren't bullied, you want to see bullies punished, to maintain positives in the company and want to enjoy those without the negatives of being bullied, or perhaps that you believe in the goals of the company or have some stake in it, and want it to succeed. Different goals might lead you to a different course of action.

Next, you would want to diagnose what's really going on. Are there just a few bullies, in a company mostly full of professional people, or are the bullies the majority? Are senior leaders in on the bullying, or is it only lower level employees? Why do you think the bullies were hired in the first place - is it because bullying is considered okay in the company, or is it not considered okay but they slipped through? Why do you think the bullying hasn't been addressed already? Is it because senior managers don't know? Are the bullies friends / relatives of senior leadership? Are the bullies high performers that the company really would want to keep around, or do they get barely get anything done? Also, are the bullies even aware they are being bullies? Are they unaware they are being insensitive, and likely to change if made aware, or are they actively being malicious and well aware of the impact?

Next, consider the direction you want to take, and analyse the likely impact on your goals. You could find another job - how easy that is would depend what the job market looks like for your role, and how good the terms of your current job are. It wouldn't achieve goals around making it better for others. You could try talking to the bullies if you think that they might just be unaware of the impact of their behaviour and that they might change. If that doesn't work, you could try talking to a manager / HR member, perhaps either to arrange mediation, or for them to take action. You could also just try ignoring the bullying if it isn't having much impact.

To choose from the many possible directions, it might help to think from the perspective of the company shareholders, senior leadership, and HR department. What would you do in their shoes if you learned of the bullying? If it is the majority of the company doing the bullying, then something like replacing all the bullying staff is going to be an instant non-starter. The best possible would be to slowly roll out training, policies, and new hiring practices to try to improve the culture over time. If it is a few people who, it now turns out, are the reason for high staff turnover and lower profits, then they might be quite happy to take action. Although probably not if the bullies are the senior leaders.