Strictly speaking, you don't need ANY tools to succeed with SEO. Using multiple tools is overkill and usually leads to an over-reliance on tools, though. Since most of your competition are using basically the same sets of tools, the best way to succeed is to focus on what you're doing that doesn't rely on tools at all.
But I don't see getting to the next level based on signing up for more tools than a single good one like ahrefs or semrush.
Randy Ray
A good traveler has no fixed plans and is not intent upon arriving. -Lao Tzu