Final answer:
Omaha, Nebraska is the largest city on the Missouri River and is home to Warren Buffett. It's a significant telecommunications hub due to its central location and uses the Midland English dialect.
Step-by-step explanation:
The largest city of Nebraska on the Missouri River, which has Council Bluffs, Iowa sitting across from it, is Omaha, Nebraska. It is noteworthy as the residence of billionaire Warren Buffett. Omaha is a significant hub in the telecommunications industry, partly due to its central location in the United States. The city also leverages a dialect known as Midland English, which is widely understood across the country, hence facilitating communication and media broadcasting.