It is difficult to say. If you enjoy The Holy Bible, then Journal for Plague Lovers (2009) could be a good one. It was released after Send Away the Tigers and features lyrics from Richie Edwards (he left them to the band before disappearing). If you want something closer to Send Away the Tigers, Postcards from a Young Man (2010) and Resistance is Futile (2018) are both kind of cut from the same cloth (as much as this can be said for a band as diverse as the Manics).
Rewind the Film (2013) is a very intimate acoustic album; I quite like it, but it is not to everyone's taste. Futurology (2014) is a colder album, inspired by Krautrock and early Simple Minds. Their most recent album, The Ultra Vivid Lament, which is quite good, was described by the band as ABBA played by The Clash because most of the songs were written on a piano. Lyrics are more introspective, but they still getting political when it matters.
Just in case you are interested, you can find my ranking of their discography here:
https://forum.maidenfans.com/threads/manic-street-preachers.71734/post-983890
Happy listening!