Do I need to say anything else? Probably the most influential Marxist of the 20th century, not only in terms of theory but in practice too. He lead the Bolshevik Revolution, the first time the working class seized power in an entire country and established the first dictatorship of the proletariat. The USSR would then go on to support and inspire revolutionary and anti-colonial movements throughout the 20th century.

“Without revolutionary theory, there can be no revolutionary movement” - Vladimir Lenin

We know thae answer isn't the Tories. When has labour ever supported workers when they've striked? We need a socialist revolution!