ECS and some ECS Fargate work great - I really like that combo. Seems pretty low overhead, and ECS anywhere I've had some luck with just playing around (you can do a local box on a 1Gig link with tons of RAM / Storage etc).

My one compliant is around having fallback to on-remise providers / capacity provider etc support - doesn't seem fully fleshed out across ECS/Fargate/ECS anywhere but I may not have read docs properly yet.