This.
First undisputed Queen regnant was her sister Mary and she immediately had issues when she married.
Prior to that - Maud who fought a civil war and then had to let throne go to her son. Eleanor, Fair Maid of Brittany had better claim than King John spent her life locked up -after her brother was murdered -because of it. Elizabeth York who had to marry Henry VII and unite claims to get anywhere with claim.
Queen Mary was next Queen - her husband William was co-monarch and was thrid in line anyway and suited many to have dutch alliance and he was protestant - and the one the Lords behind the The Glorious Revolution wanted anyway.
Then Queen Anne - who seems to be first who husband wasn't a noted issue really. Then Victoria - who faced public worry about her husband and his power and influence.
Queens are allowed unlike as in other monarchical systems were they could not happen but were an anomaly and Queen power along side idea of wife obeying husbands in past was problematic.
So position of Queen Regnant was probematic position - as well as powerful lords already having issue with boss being a woman they also freuqnetly disliking having a foreign prince outrank them and potentailly drag them into foreign wars or one of their own raised up to higher power than them with marraige to the Queen.
Elizabeth did seem to think about it with Robert Dudely who wife died in mysterious circumstances though likely had breast cancer - but was too controversial and scandal ridden and her grip on power to insecure to risk scandal- Mary Queen of Scots later lost support when scandal engulfed her reign. Elizabeth later she seems to have used idea of her marraige as a poltical tool.
Also Elizabeth had bad history possible SA from her Step mother husband Thomas Seymour - who behaved very improperly towards a young teenager in his household and under his protection - to point it was speculated she could have been pg with his child - very unlikely - but she did do a PR campaigh at her brother's court to win back her reputation ie dressing very plain and modest and did put her household members she was close to at risk as they were questioned.
Upshot Tudor dynasty not secure - few others had better claim - Elizabth not secure as only second accepted Queen of England and her sister first had has a really shaky run and her husband Philip of Spain didn't help that.
All candiates had downside and she liked a male court running round flirting with her and doesn't seem particularly bother by babies and kids and would have know how dangerous childbirth was in Tudor times - she lost two step mums to childbed not to mention numerois babies lost and pg issues in her famly and false pg her sister went thorough with loss of reputation.