Best model to use as agentic AI for RTX 4090?

I am currently doing the mcp course from huggingface, and I am planning to roll my own local agentic AI. Any idea what the BEST model I should use for RTX 4090? I know best is objective, so I am looking for two models, one for general purpose, and the other for coding. I will be building simple tools for personal use. For example, making a custom resume generator given job description etc.