The phrase "has even been considered" is grammatically correct and can be used in written English.
It is often used to emphasize that something has been thought about or taken into consideration. Example: "The proposal to build a new park in the city has even been considered by the mayor himself."
"Our defence has been dismissed before it has even been considered.
Security of the airspace over each N.F.L. stadium has even been considered.
Gaudí was an ardent Catholic and in recent years has even been considered a candidate for sainthood.
At about 20 years of age, there is a return to earlier sleep timing, and this shift has even been considered to provide biological evidence of the end of adolescence.
DENVER — The San Rafael Swell, with its miles of twisting sandstone spires and towering mesas, has long been a draw for hiking and canyoneering, and has even been considered for designation as a national monument.
Interestingly, autocatalysis has even been considered an instance of positive feedback [ 5].
The Premier League has even been considering using new technology embedded in players' shirts to monitor their temperature and heart rate, so we could actually see how nervous a player is before an important penalty kick.
The letter quotes Mr. Perello as saying that no citywide marketing arrangement had even been considered before the Department of Education chose Snapple.
If nothing else, Hamilton said, the Obama administration would have had some explaining to do if no progressive candidates had even been considered.
For Kwan and pitcher Mark Prior to have even been considered for the Sullivan Award is a slap in the face to true amateur athletes.
As recently as last year, it would have been unthinkable for these bills to have even been considered in a Senate committee.
