Weren't you asking similar questions before, i.e. moving to Cyprus to improve your tax situation?
You must move your a*s, there's no other legal way to evade tax. If you want to set up an offshore structure that lets you evade Greek tax legally while living there full-time; a solution passes the test of tax investigator's visit, then assume at least 50,000 euros per year for offshoring costs. A minimum-wage hipster slav working in a potato field will not be perceived as legitimate business management operation in Estonia. Tax investigators do have a little more than one brain cell.
Paying tax in Greece could be︀ cheaper in your situation.
@ Estonia
1. "Estonian E-residency" has nothing to do with residency.︁ It's an oxymoron and it only means that Estonia did some basic due diligence and︂ background checks on an individual. You may find that some banks and EMIs appreciate that︃ E-resident status while others couldn't care less. In any case, it will get you access︄ to Estonia's digital realm through the digital signature. All business affairs can be managed remotely︅ which in of itself is worth something.
2. According to DTA, all corporate taxes would︆ be payable in Greece according to Greek tax rates. Permanent Establishment definitions include "Place of︇ Effective Management" - where your a*s is located.
James Blakes' quote about Estonian corporate residency︈ through place of incorporation holds true, but it's entirely redundant according to agreement Greece and︉ Estonia signed. There is no dual corporate tax residency and all corporation taxes are due︊ in Greece according to Greek rates. If he lived in, and managed his corporation in︋ Afghanistan, then there would be dual corporate tax residency that would require further cooperation between︌ tax authorities to settle where (and how much) tax is to be paid.