Well, I have another list of Windows 98 and SE keys, also from around the web:
Some Windows 98 CD Keys you can try are:
R3TQR-PQTKG-HBVQ9-YBFH3-CGCRT worked with German full, English full (OEM), UK Edition, Compaq English, Spanish Full, Dutch, Compaq and IBM Recovery CDs, and U.S. Second Edition (SE) OEM, Dell SE laptop, Toshiba 4100XDVD.
Q2YHH-GYWV2-MDXCD-H9P2X-HYVMM worked with several versions including SE (Second Edition), UK Edition, and US OEM.
R34DV-VB6WM-XMHHV-WM4Q2-WBB3Y is supposed to work with all version of first edition Windows 98 (4.10.98), UK Edition.
T7J8Q-MH7RP-9H9J2-2HVFG-C3X2M worked with four U.S. retail versions (4.10.1998) as well as second edition version.
JJK9P-G8JYJ-X24RC-XTFJ4-K9W4W worked with English retail version (CA), UK Edition.
MMHK7-QPHQG-KMTP9-7GTJY-JQ6XM worked with English Retail Second Edition v4.10.2222A. Also, HP 4440 recovery disk, UK Edition.
XB88B-9B96V-CRJPG-64882-GQBDD Full verison, not upgrade, also Second Edition, UK Edition
DJK2X-6XFJB-Q9J7J-WGC7P-WMHYG Compaq, HP, IBM, etc., UK Edition
HGBRM-RBK3V-M9FXV-YCXDK-V38J4 Apr 98 Beta
MD97J-QC7R7-TQJGD-3V2WM-W7PVM came with English Developer's Connection Version. Seems to work with same CD's as T7J8Q... above. Also Japanese version.
DCTB2-4RV9D-3TXP2-F89JK-26XWQ Universal key for all languages (Denmark, ...)
K4HVD-99TJ9-6CRXG-C9G68-R92D3 OEM French WIN98SE
BQRYF-BQ4BF-Q4VFX-D9PRC-YTCV7 French Update CD
HBM43-PD86Y-9R8HM-4GM8H-TVG3Q UK Edition
BHB6V-JYFJ8-V9C47-QDB6B-JCTXK UK Version
Q988C-P7VK2-K2K7R-QX9W9-7CDW3 UK Edition
QP46B-G4WJ9-7PPBJ-RK7R8-TFM3B (also SE)
Windows 98 Second Edition Upgrade CD Key that should bypass the requirement to have Win95 installed:
H26W6-897MW-6T4WY-P3G98-GR342 Win 98 Upgrade Second Edition, bypasses Win95 requirement
Windows 98 Second Edition (SE) CD Keys you can try are:
RW9MG-QR4G3-2WRR9-TG7BH-33GXB Full Edition, English UK, French DKJQY-TMJGF-BYYPQ-Q2HB7-W2K3V Upgrade English, U.S. Version K4HVD-Q9TJ9-6CRX9-C9G68-RQ2D3 Win 98 Upgrade Second Edition, also 1st edition full retail HQ6K2-QPC42-3HWDM-BF4KJ-W4XWJ Win 98 Second Edition English, also Danish, Norwegian and Norwegian OEM, UK Edition (product ID 16203-OEM-0000007-00651) JHD22-PY6C8-GGTJC-HYYWT-TF7MY Ver 4.10.2222A Retail T7FCQ-XTD3Q-YY6QD-TGYJQ-7BPJJ UK Version HQ88R-P7JWC-4FYHY-DK6MV-HT3CD Plus SE U.S English Ver 4.10.2222A T7J8Q-MH7RP-9H9J2-2HVFG-C3X2M P767C-WKHX7-62TFV-H6XTP-JXFQM works with ver. 4.10.2222 English, UK Edition, also Packard Bell Master Recovery CD MKMXV-CDQGH-98HCX-3HM2C-G3T7B, UK Edition XQY3P-8MMD2-JC6M2-HJDYW-P6H7B, UK Edition d6xwh-xkvv6-t2f87-kb2kh-9h3yg from Compaq OEM system, UK Edition BBH2G-D2VK9-QD4M9-F63XB-43C33 Chinese Language, Full Installation J3R3W-VBVDF-2496X-46TQB-HH8BY Australian English. Product Key 792807368, UK Edition TR9TQ-F4JRW-FXM4G-3H7V2-FH4J6 UK and Chinese Version W7XTC-2YWFB-K6BPT-GMHMV-B6FDY Second Edition English QMPMF-23D8R-83GV6-MMR3C-BQ7C3 UK Edition QCWJD-F94YQ-KWQXX-M48M3-MCFQW UK Edition WTY8X-CQP24-MX9TD-GBBD9-JKCXP (upgrade) WGJTT-2Q9MV-3TB8B-DQ77Y-C6QKB UK Edition TVYGH-V683W-3CWT9-MQ468-G66WR Upgrade DBRCB-D43K3-VY4G4-KVG4H-6FK9M Australia, Compaq PRDDH-83JD9-G6PK4-684GF-6Y73B Dell OEM English and Dell upgrade. Phew.
I've spent a lot of time trying all these serial keys with the copy of Windows 98 (First Edition) from wdl1.winworldpc.com, but only MMHK7-QPHQG-KMTP9-7GTJY-JQ6XM worked for me, so that key should be first priority.