Emuparadise
Emuparadise is not only one of the safest rom sites but also one of the most helpful tools, as anyone who often finds retro games and other items would know. They offer thousands of ROMs for download for a wide range of platforms.
The cherry on top is their Advanced ROM browser, where you can find all kinds of ROMs and categorize them based on various criteria.
You can select games, operating systems, genres, chronological order, safety ratings, and much more. Numerous systems, including the Atari, Capcom Play System, Sega Model 2, Nintendo GameCube, MAME, and a number of handheld devices, are available for download on Emuparadise.
You can learn more about various additions and additional ROMs. In fact, the website offers a complete ROM set in a single download, which is the most I believe any website can provide. Everything is available for free download, and registering on the website is unnecessary.
Website: https://www.emuparadise.me/roms-isos-games.php