Spoiler alert! If you own an iPhone then Chipolo is the grandly obvious choice (if you don’t go with an AirTag). If you own an Android phone, the Tile is the grandly obvious choice. ;-)
If you live in a country that has a solid Apple/iPhone presence, FindMy is in a class on its own. Tile and the Samsung tracker aren’t junk by any means but the FindMy network size/reach and it’s integration into IOS/ipados/watchOS-iCloud is currently unbeatable.