Some game providers that are widely regarded as doing a good job of optimizing their games for mobile devices include:
1. Supercell - Known for popular mobile games such as Clash of Clans, Clash Royale, and Brawl Stars, Supercell is known for creating highly engaging and optimized games for mobile devices.
2. King - The creator of Candy Crush Saga and other successful mobile games, King has shown expertise in optimizing their games for mobile play.
3. Gameloft - With a focus on creating high-quality mobile games, Gameloft has been praised for its optimization of games for various mobile devices.
4. Zynga - Known for games like Words with Friends and Zynga Poker, Zynga has demonstrated skill in optimizing games for mobile playability.
5. Playdemic - The developer behind the popular golf game Golf Clash, Playdemic has been successful in creating mobile-optimized games that attract a large player base.
These and other game providers are continually working to optimize their games for mobile devices, as the mobile gaming market continues to expand and evolve.