O2 Academy is really good in my opinion. It's basically just a small hall. Sound is fine and anywhere you stand is really close. Transport links and parking are also great (for me anyway!)
Not seen a bad show there (with the exception of Gaslight Anthem and that's because Brian Fallon has extremely boring chat nowadays...)
Maybe FKA Twigs to headline West Holts and Patti Smith to headline The Park? Massive Attack headline The other again and Beth Gibbons on Woodsies somewhere.
if all of those folks show up somewhere with no clashes Im a happy man