Taiwan Semiconductor is a vital business in the AI realm.The best artificial intelligence (AI) stock to buy right now is an incredibly hot topic. Some may argue that it's Nvidia; others may prefer Microsoft. While there are merits to both arguments, I prefer a different AI company.Like most AI businesses, my top pick isn't 100% focused on AI; it's all part of a larger strategy. Furthermore, without Taiwan Semiconductor Manufacturing (TSM -1.27%), none of the AI technologies would be possible. Luckily for in ...