Hi Kenneth,
Thanks for using Syncfusion Products.
Essential Chart control support Custom Point feature instead of Annotation. Also support to customize the text, text color, location of the custom points.
Please take a look at the attached sample.
http://websamples.syncfusion.com/samples/Chart.Windows/F61264/main.htmLet me know if you have any more queries.
Regards,
Rashidha.