Progrey blogger template collection is the template blogger with high score seo, you can check in chkme.com and see the seo score 80%, you can improve the score seo blog up to 90% - 95% depending on your setup. even if the appearance is simple but has a nice feature.
Platform: Blogger / Blogspot
Author : Blogger hack
Template features : Progrey is free blogger template collection with 2 Columns, Right Sidebar, Social Widget, space for ads, footer columns, Neutral colors,and post tumbnails.
Basic tutorial : How to instal blogger template