I can provide you with some well-known modular home builders that were recognized for their quality and reputation as of my last knowledge update. Keep in mind that industry rankings and reputations may have changed since then, so it’s crucial to conduct updated research. Here are a few modular home builders known for their quality work:

1. Clayton Homes:
   • One of the largest manufacturers of manufactured and 2 story modular homes in the United States.
2. Champion Homes:
   • Known for a variety of factory-built housing, including modular homes.
3. Ritz-Craft Corporation:
   • A modular home manufacturer with a reputation for high-quality craftsmanship.
4. Modular Direct:
   • Offers a range of customizable modular homes with a focus on energy efficiency.
5. Excel Homes:
   • Known for energy-efficient modular homes with customizable floor plans.
6. Karoleena Homes:
   • A Canadian company recognized for modern and environmentally friendly modular homes.
7. Method Homes:
   • Specializes in custom, modern, and sustainable modular homes.
8. Stillwater Dwellings:
   • Known for contemporary and architecturally distinctive modular homes.
9. Palm Harbor Homes:
   • Offers a variety of manufactured and modular homes with a focus on energy efficiency.
10. Proto Homes:
    • A company that combines modular construction with custom design for contemporary homes.

When looking for a modular home builder, consider your specific needs, budget, and the builder’s reputation for quality construction. Check online reviews, customer testimonials, and any recent awards or recognitions. Additionally, verify that the builder complies with local building codes and regulations.

For the most accurate and current information, I recommend checking industry publications, customer reviews, and consulting with local real estate professionals who may have insights into reputable modular home builders in your specific region.