The phrase "a serious range of" is correct and usable in written English.
It can be used to describe a wide variety of options or choices that are significant or important in some context.
Example: "The conference will feature a serious range of topics, from climate change to technological advancements."
Alternatives: "a wide array of" or "a substantial variety of".
On the last leg I'd got suddenly over-confident, and had a serious dose of range anxiety.
Due to a fatal combination of a heavy snowstorm and a range of serious pilot errors, Air Florida Flight 90 only managed to climb 107 metres before starting to decline on 13 January 1982.
Though he was by turns voluble, thoughtful, funny, self-deprecating and serious on a range of subjects, Gates sidestepped my questions about personal motives for his philanthropical choices.
Some years ago, a report from the World Health Organisation claimed that acupuncture is a "proven therapy" for a range of serious and treatable conditions including, for instance, stroke.
Cigarette smoking is a risk factor in a range of serious diseases, including cardiovascular disease, cancer, stroke and type II diabetes.
As a matter of fact, high myopia is often associated with an increased risk of a range of serious ocular complications, which may result in irreversible vision loss.
The office conducted an investigation that identified a range of serious flaws in 2012.
Untreated, onchocerciasis leads to progressive visual impairment and eventually irreversible blindness, as well as severe itching and a range of serious skin complaints, collectively known as onchodermatitis.
They share a common trait: the potential to induce a wide range of serious side effects including increased risk of life-threatening infections and cancer4,5.
Severe obesity is a complex condition that is associated with a wide range of serious health complications and reduced health-related quality of life (HRQoL).
