Good ones probably spring easily to mind because truly impactful short-term loans are rare. Think of Jesse Lingard at West Ham United in 2021 and Daniel Sturridge at Bolton Wanderers a decade earlier.
Go further back to find Christophe Dugarry sprinkling stardust on Birmingham City and forging an unlikely strike partnership with former bricklayer Geoff Horsfield as they climbed away from relegation trouble.
All international-class forwards who hit the ground running.
Lingard scored nine Premier League goals in 16 appearances for the Hammers on loan from Manchester United, more than he scored for one club in any single league campaign.