What do you mean by "successful?" Is there a metric you want to look at specifically? There are numerous metrics we can track and compare with Pre-Socialist conditions.

As for what countries have implemented "my preferred alternative," this is also an undeveloped fragment. No system can or should be 100% my personal preference, every country has different conditions, and simply copying others isn't how systems are run.

To answer your question, numerous countries have become Socialist. The USSR and PRC are the biggest examples, and for metrics both countries doubled life expectancy, eliminated famine, tripled literacy rates, and generally industrialized as compared to the Tsarist system or under the Nationalist KMT, respectively. They had and have numerous problems, corruption in the USSR and the Cultural Revolution under Mao, but conditions for the average person rapidly improved.

I am not advocating for copying these systems 1 for 1, but learning from what worked and what didn't. It seems that eliminating the profit motive and focusing on satisfying needs through servives like free healthcare and education makes a huge difference in a population.