Thunder I've seen live, I think, but they left an indelible blank on my mind.
Status Quo you may well know (if only for opening Live Aid at Wembley), but Ma Kelly's Greasy Spoon is such an obscure, early album that many of their UK fans will never have heard of it. I was a big fan >25 years ago and I've never heard that album.
Hawkwind are probably best known for 'Silver Machine' and at one time employed one Ian (Lemmy) Kilmister on bass. Sci-fi writer Michael Moorcock wrote a few songs for them.
Saxon were part of the so-called 'New Wave of British Heavy Metal' spandex-brigade in the early 80's from which emerged Iron Maiden and Def Leppard. Saxon are from Yorkshire, and a reasonably entertaining bunch. I think they're still on the road occasionally. 'Princess of the Night' is an old favourite of mine, while 747 (Strangers in the night) and Wheels of Steel are probably their signature tunes.
There's no excuse for never having heard of Marillion though.