30 to 950MHz with a single antenna would be an extreme compromise in every way unless you want directional, then a big log periodic will perform well across that range. But it will be big and directional. And expensive unless you find a deal on a mil surplus unit.
Most antennas I've seen advertising that kind of range are Discones with a whip and the typical scanner DIscone can work ok from a little above 100MHz to about 500MHz then it degrades a lot in the 700/800/900MHz range due to upward pattern shift. The whip on top is usually tuned to 50MHz where it performs about as good as a 49MHz telescoping whip on a walki-talki, then it drops off like a cliff above and below 50MHz. In the big picture its grim at best but its what most of us are forced to use due to space, $$ or lack of knowledge on how to do better.
The way I see it is you own a big popular scanner/SWL website and associated companies. You should have the best monitoring setup on the planet for that reason if nothing else. In your case I would go for several to many real antennas, not toy antennas, somewhat broad band but lots of gain within their advertised frequency range, then combine them all with no amplification unless your going to feed multiple receivers.
I did this to some extent but don't use it much. But as an example of what I did here once is a military OE-254 Bicone that normally covers 30 to 88MHz but I replaced the elements with longer ones giving up some of the top end to get CB and 10m at the bottom end. This antenna works fantastic from CB through 6m and more with full size half wave dipole performance across the entire range.
Then I have a mil surplus Discone for the VHF air band, then a 4-bay dipole array from Sinclair for 2m through high 160MHz range, then a huge 225-400MHz gain type omni, then a big exposed dipole array from Antenna Specialists for 440-470MHz, then a gain type stick for 700/800MHz feeding a big diplexer. But most of the time I have all that disassembled with the various antennas feeding specific radios.
For you I would consider the same military surplus OE-254 for 30 through 88MHz (or a smaller military COM-201B) then transition to an actual VHF air band antenna, full band with a little gain. Then a large gain type, probably exposed dipole array for 136-174Mhz and you will have about 6dBd omni gain for a 4-bay array. Then a military 225-400MHz high gain omni. These are hard to come by but I have a spare one in storage that's 11ft long and a good 4 to 5dBd gain.
Then another exposed dipole array for 406 to 512MHz with about 6dBd gain. If you need coverage from 512 to 700Mhz there are various antennas that will cover that range. Then a big broad band high gain omni for 700 through 900MHz or a little past. Then combine them all with a custom pentaplexer or whatever is needed from Austin Antenna. I have several from them that almost cover the bands I just mentioned and they can produce a custom version for whatever ranges you would need. Or feed a custom multicoupler with separate band inputs.
With what I just described you would have a significant amount of gain right at the antenna and a good 4 to 6dB at the very least to 20dB or more gain than the best Discone or other single broad band scanner antenna available. You could never get the huge SNR using small antennas with amplifiers, you must start with gain at the antenna to get the SNR way up. That will make up for most any feedline loss and give huge SNR ratio at the receiver(s). Then a high level, probably two section custom multicoupler that has separate amps for the low and high frequency ranges at minimum and internal diplexers. I could build the multicoupler with parts here on hand.
Anyway, you deserve the best so why not get the best? If the wifee gives you grief, just tell here you deserve the best (like marrying her) so you are getting the best in antennas to complement her.