andrew gold was, sadly, terribly under-appreciated. if you enjoy the first four albums you must continue on your quest of andrew gold.
1978: The Late Show - a live posthumous live release.
then the next 7 solo albums:
1996: Andrew Gold's Halloween Howls - more for kids, but very well done and has a duet with linda ronstadt
1997: Greetings from Planet Love (as The Fraternal Order of the All) - his psychedelic album, amazing studio tricks on this one, that's all i'll say.

1998: ...Since 1951 - pop
1998: Leftovers - pop
1999: Warm Breezes - pop
2000: The Spence Manor Suite - country pop
2002: Intermission - pop
2008: Copy Cat - covers, but not just covers, 'exact' soundalike covers. he could do wonders in the studio, quite possibly on par with todd.
2020: Unreleased Gold - songs form 1973, gold's first recordings
before and during the above are the wax (with graham gouldman) albums:
1986: Magnetic Heaven - good 10cc-ish pop - all 4 of these
1987: American English
1989: A Hundred Thousand in Fresh Notes
1997: The Wax Files
1998: Common Knowledge.com
2000: Bikini
the 2 albums with bryndle:
1995: Bryndle - great album, lost in time
2002: House of Silence - gold makes a very minimal appearance on this one, i think he is one or two songs only.
and don't forget his appearance on 10cc's 'ten out of 10' and 2 songs on 'mirror mirror'. and 1 song on '...meanwhile'.