Hardware or software synth? Price no object or within a price range? When you stated you don't want to "map or manage many settings" to me that means you want it to be general midi compliant or for PG Music to have a patch map available for download.

The most inexpensive solution is likely a software solution. Two choices are Coyote Forte and Roland TTS-1. Coyote is available from PG Music while TTS-1 is included with any Sonar (Cakewalk) product.

Hardware choices are keyboards that include sound modules and sound modules. Both are available used or new at prices ranging from $10 (yardsale) to $$$$$$$$$$$$$. The two most popular high end sound modules are Integra by Roland and Motif by Yamaha. PG Music sells a sound module made by Ketron. It has a good reputation for good sound at a reasonable price.

Jim Fogle - 2025 BiaB (Build 1128) RB (Build 5) - Ultra+ PAK
DAWs: Cakewalk Sonar - Standalone: Zoom MRS-8
Laptop: i3 Win 10, 8GB ram 500GB HDD
Desktop: i7 Win 11, 12GB ram 256GB SSD, 4 TB HDD
Music at: https://fogle622.wix.com/fogle622-audio-home