Pensieve header: SS: a Shielded version of Series.

ℏ=5;
Series[(E^ℏ), {ℏ,0,1}]

ℏ=5;
Block[{ℏ}, Normal@Series[(E^ℏ), {ℏ,0,1}]]

SetAttributes[SS, HoldAll];
SS[ℰ_] := Block[{ℏ}, Normal@Series[ℰ, {ℏ,0,1}]]

SS[(E^ℏ)]