ECS Fargate. We used it for a lot of stateless containers, similar as you mention. I tried to migrate from ECS Fargate onto EKS, but moved back after a while. The reason was the "management" overhead of babysitting the cluster and it's non-app deployment like cilium, fluxcd etc. - Since those were part needed and part QoL features we came to the conclusion that ECS Fargate was the better and less 'head ache' solution. I would do it again. Especially not thinking about provision new nodes etc.

Sure you pay for that comfortable solution, but it was worth in my opinion

Go with ECS if you don’t need Helm and significant operational overhead. Having used both ECS and EKS for the past few years, I’ve found that ECS requires negligible maintenance.

BTW: Checkout ecs fargate too. if workload is small this will do the most.