Well her new release of standard with Geoff Eales sounds very intriguing.
Try her with Schweitzer and Leandre in Les Diaboliques. I saw them live and it was one of the most uplifting improv gigs ever, genuinely fine use of humour.
A different tack, try 'And John' with the ever wonderful Mark Wastell on Confront Recordings.
Then with Keith and Julie Tippets there's the fabulously titled 'Mr Invisible and the Drunken Sheila's...' on FMP
An early Leo Records with Peter Nu too
Some of the most joyous and engaging live vocals I've seen were her with Julie T as the vocal section in a Louis Moholo-Moholo big band gig. They just had such fun.
She's the antidote to po-faced improv. I don't get everything she does by a long chalk but when I do I love it.
She's at Oto with the standards group soon, I'm seriously tempted
I forgot this one, excellent
https://www.discogs.com/master/3266284-Maggie-Nicols-Matilda-Rolfsson-Mark-Wastell-Semiotic-Drift
Also, her work with SME, Oliv etc