Sendgrid but with your own SES

Hello everyone
So yesterday I was talking with someone in discord and they asked me what emailing service I use for my applications and I answered SES and told them how great it is on delivery but lacks features that other providers give you but on the other hand if you use SendGrid which gives you tones of features you have lots of emails ending up in the spam.
They confirmed they had the same problem with SendGrid and other providers and that's when I thought why there is no tool that you can provide your SES configuration and it basically gives you all the features that SendGrid gives to you but you don't have to worry about deliverability.
I searched a little bit and there are a bunch of analytic dashboards but nothing with actual functionalities like sending scheduling, or template builders for SES.
If I build something like that would you pay $5 a month for a basic plan (there will be more advanced features like webhooks and etc for higher-priced plans)
Cheers